P-State/CPUFreq Governor Tests With Linux 4.12 For OpenGL/Vulkan Games

Metro Last Light Redux only encountered minor changes in performance with Linux 4.12.

Portal is quite CPU-bound to begin with and it did see minor frame-rate increases from P-State powersave to performance and then a drop off when using CPUFreq schedutil/conservative.

Tesseract was most notably impacted when using ondemand and conservative governors.