Move frame-buffer and drm renderers back to main package
Turns out that if we put *both* in the graphics-libs subpackage
minimal installs with 'rhgb' (which is what anaconda does out
of the box) break. As @pbrobinson wasn't around to explain the
rationale for moving the drm renderer to the subpackage in the
first place, @halfline and I agreed to put both renderers back
in the main package for now to avoid both that problem and
bug #1518464 . We can revisit this after @halfline does some
upstream code fixes.