The following patch creates a hello-mod recipe for building a trivial
out-of-tree kernel module, hello-mod.ko. This demonstrates the hostprogs
build modifications added to module.bbclass. When loaded and unloaded,
the module prints a simple string to the console to demonstrate it was
compiled correctly.

Tested on qemux86 poky-image-sato and beagleboard poky-image-minimal
(after adding hello-mod to the images).

(From OE-Core rev: d4765569d51448e8918bb15e7ab342983344074a)

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
CC: Gary Thomas <gary@mlbassoc.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>