llandwerlin-intel

We should probably drop the intel extension. Same stuff can be implemented with KHR. I guess we should also replace glslc by glslang.

I'm experiencing an assert in debug builds : ``` 4\Stray-Win64-Shipping.exe: ../src/vulkan/wsi/wsi_common_x11.c:908: x11_surface_get_formats2: Assertion `f->sType == VK_STRUCTURE_TYPE_SURFACE_FORMAT_2_KHR' failed. ``` This doesn't look like it's coming from DXVK after grepping the code....