Open-Source AMD/NVIDIA GPU Tests On Linux 4.1 + Mesa 10.7-dev

The Radeon Gallium3D stack will run the Unigine tests out-of-the-box fine and there the results are basically as expected.

Xonotic with high image quality settings at 1920 x 1080 is playable on all the tested graphics cards except for the GTX 750 Ti being bound to its very low boot frequencies.