This enables GL applications to be written without any involvement of
Xlib.
EGL X11 platform is actually already xcb-only underneath, so this commit
just add the necessary interface changes so eglDisplay can be created
from a xcb_connection_t.
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6474>
53660e4c4e