ARB_enhanced_layouts Lands In Mesa Git, Rounds Out OpenGL 4.4 For RadeonSI

The work by Nicolai Hihnle on finishing up the GL_ARB_enhanced_layouts extension for Gallium3D is now in Git. This officially marks RadeonSI done with OpenGL 4.4 and is effectively done with OpenGL 4.5 although the new version string is yet to be advertised...