RADV Sees Experimental Fragment Shader Interlock - Important For Emulators, D3D12

A currently-testing implementation of VK_EXT_fragment_shader_interlock has been published for Mesa's Radeon Vulkan "RADV" driver. This Vulkan fragment shader interlock support is used by some game emulators as well as being useful in running Direct3D 12 atop Vulkan and similar purposes...