qt-mobility: tighten up config generation and use PACKAGECONFIG
* Add DEPENDS on util-linux (for libblkid) and gstreamer (was likely
always being auto-detected since it is currently an unconditional
dependency of Qt itself in our Qt recipes)
* Use PACKAGECONFIG to allow individual configuration of pulseaudio and
bluetooth features rather than additional variables
* Generate a static platform configuration and tell the configure script
to use that instead of running compile tests during do_configure. This
should avoid the issue of camerabin sometimes being built and failing
as seen on the Yocto Project autobuilder.
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Saul Wold <sgw@linux.intel.com>