Work around RHBZ #1663050 (tty quitting on exit from startx)
    
    A bug showed up in Rawhide where, when you run startx in a tty,
    when you exit that X session, the tty quits and returns to the
    login prompt. This is a slightly sloppy workaround for that
    problem.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>