Fixes [YOCTO #2808]

The new section on package creation required a new figure.
I added the figure to the TARBALL creation part for both the
ref-manual and the mega-manual.

(From yocto-docs rev: 3e752dd95659282833519bff866adc940a156ba7)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>