Extend GL_MESA_framebuffer_flip_y to GL 4.3+

This commit extends GL_MESA_framebuffer_flip to work with GL 4.3, in
addition to GLES 3.1. We add a GL extension number, modify the XML
registry and rebuild generated sources.

GL 4.3 is needed for FrameBufferParameteri to be available.
14 files changed