Radeon OpenGL Benchmarks On Fedora 22

For some 2D benchmarking there was GtkPerf, but the numbers weren't particularly interesting.

Overall, as long as you kept to an updated Fedora 21 package set, Fedora 22 doesn't offer much in the same of improved open-source Radeon performance. However, if comparing the out-of-the-box performance, the Radeon driver has continued to mature over the past six months in terms of (largely better) performance and new features/functionality. In a few cases though the Radeon R9 270X performance did regress and that may be worth further investigation.