ci: Drop Travis CI

We migrated to gitlab-ci now, and the travis script will only bitrot
over the time.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

.travis.yml

-language: c
-dist: bionic
-cache: ccache
-
-addons:
-  apt:
-    packages:
-      - gcc-8
-      - gcc-8-aarch64-linux-gnu
-      - libc6-dev-arm64-cross
-      - gcc-8-arm-linux-gnueabihf
-      - libc6-dev-armhf-cross
-      - gcc-8-powerpc-linux-gnu
-      - libc6-dev-powerpc-cross
-      - u-boot-tools
-
-env:
-  global:
-    - KDIR=/tmp/kernel
-    - USE_CCACHE=1
-    - CCACHE_MAXSIZE=400M
-
-install:
-  - sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 800
-  - sudo update-alternatives --install /usr/bin/aarch64-linux-gnu-gcc aarch64-linux-gnu-gcc /usr/bin/aarch64-linux-gnu-gcc-8 800
-  - sudo update-alternatives --install /usr/bin/arm-linux-gnueabihf-gcc arm-linux-gnueabihf-gcc /usr/bin/arm-linux-gnueabihf-gcc-8 800
-  - sudo update-alternatives --install /usr/bin/powerpc-linux-gnu-gcc powerpc-linux-gnu-gcc /usr/bin/powerpc-linux-gnu-gcc-8 800
-  - REV=$(git ls-remote --tags --refs ${IPIPE_KERNEL} | sed "s|.*[[:space:]]refs/tags/||" | grep "${IPIPE_REV}" | sort -r -n -t - -k 5 -k 6 | head -1)
-  - test -n "${REV}" || REV="${IPIPE_REV}"
-  - echo "Cloning branch/tag ${REV}"
-  - git clone --depth 1 --branch ${REV} ${IPIPE_KERNEL} ${KDIR}
-
-before_script:
-  - case "${ARCH}" in
-      "arm64")
-          export CROSS_COMPILE=aarch64-linux-gnu-
-          export CONFIGURE_OPTS="--host=aarch64-linux-gnu --with-cc=aarch64-linux-gnu-gcc"
-          ;;
-      "arm")
-          export CROSS_COMPILE=arm-linux-gnueabihf-
-          export CONFIGURE_OPTS="--host=arm-linux-gnueabihf --with-cc=arm-linux-gnueabihf-gcc"
-          ;;
-      "powerpc")
-          export CROSS_COMPILE=powerpc-linux-gnu-
-          export CONFIGURE_OPTS="--host=powerpc-linux-gnu --with-cc=powerpc-linux-gnu-gcc"
-          ;;
-      "x86")
-          export CROSS_COMPILE=
-          export CONFIGURE_OPTS="--enable-dlopen-libs --enable-lazy-setsched"
-          ;;
-    esac
-  - mkdir ~/ccache
-  - ln -s /usr/bin/ccache ~/ccache/aarch64-linux-gnu-gcc
-  - ln -s /usr/bin/ccache ~/ccache/arm-linux-gnueabihf-gcc
-  - ln -s /usr/bin/ccache ~/ccache/powerpc-linux-gnu-gcc
-  - export PATH=~/ccache:$PATH
-  - ${CROSS_COMPILE}gcc --version
-
-  - pushd ${KDIR}
-  - make -j $(nproc) ${KERNEL_DEFCONFIG}
-
-  # Generic settings
-  - ./scripts/config -d DEBUG_INFO
-
-  # I-pipe and Xenomai settings
-  - ./scripts/config -e IPIPE
-  - ./scripts/config -e XENOMAI
-  - ./scripts/config -e XENO_OPT_SCHED_CLASSES
-  - ./scripts/config -e XENO_OPT_SCHED_WEAK
-  - ./scripts/config -e XENO_OPT_SCHED_TP
-  - ./scripts/config -e XENO_OPT_SCHED_SPORADIC
-  - ./scripts/config -e XENO_OPT_SCHED_QUOTA
-  - ./scripts/config -e XENO_OPT_SHIRQ
-  - ./scripts/config -e XENO_OPT_SCALABLE_SCHED
-  - ./scripts/config -e XENO_OPT_DEBUG
-  - ./scripts/config -e XENO_OPT_DEBUG_COBALT
-  - ./scripts/config -e XENO_OPT_DEBUG_MEMORY
-  - ./scripts/config -e XENO_OPT_DEBUG_CONTEXT
-  - ./scripts/config -e XENO_OPT_DEBUG_USER
-  - ./scripts/config -e XENO_OPT_DEBUG_LEGACY
-  - ./scripts/config -e XENO_OPT_DEBUG_TRACE_RELAX
-  - ./scripts/config -e XENO_DRIVERS_16550A
-  - ./scripts/config -e XENO_DRIVERS_16550A_ANY
-  - ./scripts/config -e XENO_DRIVERS_16550A_PCI
-  - ./scripts/config -e XENO_DRIVERS_16550A_PCI_MOXA
-  - ./scripts/config -e XENO_DRIVERS_IMX_UART
-  - ./scripts/config -e XENO_DRIVERS_RTDMTEST
-  - ./scripts/config -e XENO_DRIVERS_CAN
-  - ./scripts/config -e XENO_DRIVERS_CAN_LOOPBACK
-  - ./scripts/config -e XENO_DRIVERS_CAN_VIRT
-  - ./scripts/config -e XENO_DRIVERS_CAN_FLEXCAN
-  - ./scripts/config -e XENO_DRIVERS_CAN_SJA1000
-  - ./scripts/config -e XENO_DRIVERS_CAN_SJA1000_ISA
-  - ./scripts/config -e XENO_DRIVERS_CAN_SJA1000_MEM
-  - ./scripts/config -e XENO_DRIVERS_CAN_SJA1000_PEAK_PCI
-  - ./scripts/config -e XENO_DRIVERS_CAN_SJA1000_IXXAT_PCI
-  - ./scripts/config -e XENO_DRIVERS_CAN_SJA1000_ADV_PCI
-  - ./scripts/config -e XENO_DRIVERS_CAN_SJA1000_PLX_PCI
-  - ./scripts/config -e XENO_DRIVERS_CAN_SJA1000_EMS_PCI
-  - ./scripts/config -e XENO_DRIVERS_CAN_SJA1000_ESD_PCI
-  - ./scripts/config -e XENO_DRIVERS_CAN_SJA1000_PEAK_DNG
-  - ./scripts/config -m XENO_DRIVERS_NET
-  - ./scripts/config -e XENO_DRIVERS_RTNET_CHECKED
-  - ./scripts/config -e XENO_DRIVERS_NET_ETH_P_ALL
-  - ./scripts/config -e XENO_DRIVERS_NET_RTIPV4_NETROUTING
-  - ./scripts/config -e XENO_DRIVERS_NET_RTIPV4_ROUTER
-  - ./scripts/config -e XENO_DRIVERS_NET_RTIPV4_DEBUG
-  - ./scripts/config -m XENO_DRIVERS_NET_RTIPV4_TCP
-  - ./scripts/config -e XENO_DRIVERS_NET_RTIPV4_TCP_ERROR_INJECTION
-  - ./scripts/config -m XENO_DRIVERS_NET_NOMAC
-  - ./scripts/config -e XENO_DRIVERS_NET_RTCFG_DEBUG
-  - ./scripts/config -m XENO_DRIVERS_NET_DRV_PCNET32
-  - ./scripts/config -m XENO_DRIVERS_NET_DRV_TULIP
-  - ./scripts/config -e XENO_DRIVERS_NET_DRV_EEPRO100_DBG
-  - ./scripts/config -m XENO_DRIVERS_NET_DRV_E1000E
-  - ./scripts/config -m XENO_DRIVERS_NET_DRV_NATSEMI
-  - ./scripts/config -m XENO_DRIVERS_NET_DRV_VIA_RHINE
-  - ./scripts/config -m XENO_DRIVERS_NET_DRV_IGB
-  - ./scripts/config -m XENO_DRIVERS_NET_DRV_R8169
-  - ./scripts/config -m XENO_DRIVERS_NET_DRV_SMC91111
-  - ./scripts/config -e XENO_DRIVERS_NET_EXP_DRIVERS
-  - ./scripts/config -m XENO_DRIVERS_NET_DRV_3C59X
-  - ./scripts/config -m XENO_DRIVERS_NET_DRV_E1000_NEW
-  - ./scripts/config -m XENO_DRIVERS_NET_DRV_RT2500
-  - ./scripts/config -m XENO_DRIVERS_NET_ADDON_RTCAP
-  - ./scripts/config -m XENO_DRIVERS_NET_ADDON_PROXY
-  - ./scripts/config -e XENO_DRIVERS_NET_ADDON_PROXY_ARP
-  - ./scripts/config -e XENO_DRIVERS_ANALOGY
-  - ./scripts/config -e XENO_DRIVERS_ANALOGY_DEBUG
-  - ./scripts/config -e XENO_DRIVERS_ANALOGY_DEBUG_FTRACE
-  - ./scripts/config -e XENO_DRIVERS_ANALOGY_FAKE
-  - ./scripts/config -e XENO_DRIVERS_ANALOGY_NI_PCIMIO
-  - ./scripts/config -e XENO_DRIVERS_ANALOGY_S526
-  - ./scripts/config -e XENO_DRIVERS_RTIPC
-  - ./scripts/config -e XENO_DRIVERS_UDD
-  - ./scripts/config -e XENO_DRIVERS_GPIO
-  - ./scripts/config -e XENO_DRIVERS_GPIO_BCM2835
-  - ./scripts/config -e XENO_DRIVERS_GPIO_MXC
-  - ./scripts/config -e XENO_DRIVERS_GPIO_SUN8I_H3
-  - ./scripts/config -e XENO_DRIVERS_GPIO_ZYNQ7000
-  - ./scripts/config -e XENO_DRIVERS_GPIO_XILINX
-  - ./scripts/config -e XENO_DRIVERS_GPIO_OMAP
-  - ./scripts/config -e XENO_DRIVERS_GPIO_DEBUG
-  - ./scripts/config -e XENO_DRIVERS_GPIOPWM
-  - ./scripts/config -e XENO_DRIVERS_SPI_BCM2835
-  - ./scripts/config -e XENO_DRIVERS_SPI_SUN6I
-  - ./scripts/config -e XENO_DRIVERS_SPI_OMAP2_MCSPI_RT
-  - ./scripts/config -e XENO_DRIVERS_SPI_DEBUG
-
-  - popd
-
-script:
-  - scripts/prepare-kernel.sh --arch=${ARCH} --linux=${KDIR}
-  - pushd ${KDIR}
-  - make -j $(nproc) olddefconfig
-  - make -j $(nproc) all
-  - popd
-
-  - scripts/bootstrap
-  - ./configure --enable-smp ${CONFIGURE_OPTS}
-  - make -j $(nproc)
-
-  - ccache -s
-
-matrix:
-  include:
-    - name: "ARM 4.19 release"
-      env:
-      - ARCH: arm
-        IPIPE_REV: ipipe-core-4.19..*-arm-.*
-        IPIPE_KERNEL: https://gitlab.denx.de/Xenomai/ipipe-arm.git
-        KERNEL_DEFCONFIG: multi_v7_defconfig
-    - name: "ARM 4.14 release"
-      env:
-      - ARCH: arm
-        IPIPE_REV: ipipe-core-4.14..*-arm-.*
-        IPIPE_KERNEL: https://gitlab.denx.de/Xenomai/ipipe-arm.git
-        KERNEL_DEFCONFIG: multi_v7_defconfig
-    - name: "ARM 4.4-CIP head"
-      env:
-      - ARCH: arm
-        IPIPE_REV: ipipe-4.4.y-cip
-        IPIPE_KERNEL: https://gitlab.denx.de/Xenomai/ipipe.git
-        KERNEL_DEFCONFIG: multi_v7_defconfig
-    - name: "ARM64 4.19 release"
-      env:
-      - ARCH: arm64
-        IPIPE_REV: ipipe-core-4.19..*-arm64-.*
-        IPIPE_KERNEL: https://gitlab.denx.de/Xenomai/ipipe-arm64.git
-        KERNEL_DEFCONFIG: defconfig
-    - name: "ARM64 4.14 release"
-      env:
-      - ARCH: arm64
-        IPIPE_REV: ipipe-core-4.14..*-arm64-.*
-        IPIPE_KERNEL: https://gitlab.denx.de/Xenomai/ipipe-arm64.git
-        KERNEL_DEFCONFIG: defconfig
-    - name: "x86 4.19-CIP head"
-      env:
-      - ARCH: x86
-        IPIPE_REV: ipipe-x86-4.19.y-cip
-        IPIPE_KERNEL: https://gitlab.denx.de/Xenomai/ipipe-x86.git
-        KERNEL_DEFCONFIG: x86_64_defconfig
-    - name: "x86 4.19-CIP release"
-      env:
-      - ARCH: x86
-        IPIPE_REV: ipipe-core-4.19..*cip.*-x86-.*
-        IPIPE_KERNEL: https://gitlab.denx.de/Xenomai/ipipe-x86.git
-        KERNEL_DEFCONFIG: x86_64_defconfig
-    - name: "x86 4.14 release"
-      env:
-      - ARCH: x86
-        IPIPE_REV: ipipe-core-4.14..*-x86-.*
-        IPIPE_KERNEL: https://gitlab.denx.de/Xenomai/ipipe-x86.git
-        KERNEL_DEFCONFIG: x86_64_defconfig
-    - name: "x86 4.4-CIP head"
-      env:
-      - ARCH: x86
-        IPIPE_REV: ipipe-4.4.y-cip
-        IPIPE_KERNEL: https://gitlab.denx.de/Xenomai/ipipe.git
-        KERNEL_DEFCONFIG: x86_64_defconfig
-    - name: "x86 4.4-CIP release"
-      env:
-      - ARCH: x86
-        IPIPE_REV: ipipe-core-4.4..*-cip.*-x86-.*
-        IPIPE_KERNEL: https://gitlab.denx.de/Xenomai/ipipe.git
-        KERNEL_DEFCONFIG: x86_64_defconfig
-    - name: "PowerPC 4.19 release"
-      env:
-      - ARCH: powerpc
-        IPIPE_REV: ipipe-core-4.19..*-ppc32-.*
-        IPIPE_KERNEL: https://gitlab.denx.de/Xenomai/ipipe-ppc32.git
-        KERNEL_DEFCONFIG: mpc5200_defconfig