More fixes for DRI. Also add support for UDEV for hotplug events.
More fixes for DRI. Also add support for UDEV for hotplug events.

freedesktop-unofficial-mirror/openchrome__xf86-video-openchrome,freedesktop-unofficial-mirror/openchrome__xf86-video-openchrome,freedesktop-unofficial-mirror/openchrome__xf86-video-openchrome,freedesktop-unofficial-mirror/openchrome__xf86-video-openchrome