This updates the bbappend to the newer version; as mesa now provides
the needed PACKAGECONFIG settings we rely on this instead of using an
annonymous Python code to change it during build time.
The bbappend file now is much easier to read.
Change-Id: Ie7b6027462f458d139d0561e737b254dd8b07653 Signed-off-by: Otavio Salvador <otavio@ossystems.com.br> Tested-by: Gary Thomas <gary@mlbassoc.com> Tested-by: John Weber <rjohnweber@gmail.com>