- use TALLOC_LIBS/TALLOC_CFLAGS env. variables which obsolete the
requirement for a patched libtalloc-devel package, i.e.
talloc.pc is no longer required.

- Mesa git master #2dfd348 (2010-08-28)
- obsoletes libdrm_nouveau.diff.bz2, mesa-commit-06c72da.diff
- adjusted Mesa_indirect_old_xserver_compatibility.diff,
dri_driver_dir.diff
- added libtalloc-devel bison flex libxml2-python to BuildRequires
- pkgconfig file for egl