mega-manual: Added four new figures for GUI example.

Forgot to add these to the mega-manual figures folder so they
were not being found when the mega-manual was made.  This is
an issue with the tarball for jethro but will be correct for
the HTML published versions in the jethro branch.

(From yocto-docs rev: 509f5c746fc44947ed519307ec6abfa12c954bb2)

Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>