Mesa Will Stop Building Gallium-XA By Default

Back in April Mesa deprecated Gallium Nine alongside the XA state tracker used for X.Org Server acceleration. Gallium-XA was developed by VMware for use with their DDX driver for accelerating X11 within their virtualized environments. XA isn't really used these days and the generic GLAMOR code is in much better shape. Thus Mesa is now no longer building the XA code as the next step toward its removal...