I updated gstreamer too, because this phonon was not finding a header file. As that
did not fix much the phonon build, I helped the generic builder with NIX_CFLAGS_COMPILER for
phonon to find the proper header files. Either the phonon cmake scripts don't find properly
the gstreamer plugins header file, or we install gstreamer in a strange way.
svn path=/nixpkgs/trunk/; revision=19974
