Fix memset optimization errors in GCC

Recent GCC versions (e.g. GCC-4.7.2) perform optimizations based on
assumptions about the implementation of memset and similar functions.
The current ARM optimized memset code does not return the value of
its first argument, as is usually expected from standard
implementations.

Signed-off-by: Stephano Cetola <scetola@reachtech.com>
Compile tslib with correct linux headers

tslib uses the wrong headers when compiling. This code should force it
to use the "staging kernel" headers instead.

Signed-off-by: Stephano Cetola <scetola@reachtech.com>
Split the qml viewer package groups so we don't build x11 unless needed

Every package within a packagegroup is treated as a dependancy for the
packagegroup as a whole. Even if you only build 1 package, bitbake will
compile every RDEPENDS / DEPENDS in the packagegroup. This is why we
were building X11 for canby's qt4e image.

Signed-off-by: Stephano Cetola <scetola@reachtech.com>