RadeonSI OpenGL Mesh Shader Support Is Now Completed For Mesa 26.0

For next quarter's Mesa 26.0 release, the AMD RadeonSI Gallium3D driver will present OpenGL mesh shaders support. It's been a long journey from the GL_EXT_mesh_shader extension being crafted and merged to wiring up the Mesa driver support while now it's in place for the AMD Radeon Linux graphics driver...