R600 Gallium3D Now Effectively At OpenGL 4.4, A Nudge Away From GL 4.5

As a follow-up to the article a few days ago about nearly complete OpenGL 4.4~4.5 support for R600g, this pre-GCN older Radeon Gallium3D driver has landed in Mesa 18.1-dev Git support for its final OpenGL 4.4 extension...