Extend the FXAA compile failure workaround to all Mesa given OpenGL < 3.0.
Extend the FXAA compile failure workaround to all Mesa given OpenGL < 3.0.

This is a shader bug, not a compiler bug; once fixed, it should be safe to
remove this workaround.

DaemonEngine/Daemon,DaemonEngine/Daemon,DaemonEngine/Daemon,DaemonEngine/Daemon