configure: mark support for GStreamer 0.10 as obsolete.
configure: mark support for GStreamer 0.10 as obsolete.

Support for GStreamer 0.10 is obsolete. i.e. it is no longer supported
and may actually be removed altogether for a future release. There is
no real point to maintain a build for such an ancient GStreamer version
that is not even supported upstream.

gbeauchesne/gstreamer-vaapi,01org/iotg-lin-gfx-gstreamer-vaapi,01org/iotg-lin-gfx-gstreamer-vaapi,gbeauchesne/gstreamer-vaapi,ceyusa/gstreamer-vaapi,CapOM/gstreamer-vaapi,CapOM/gstreamer-vaapi,GStreamer/gstreamer-vaapi,ceyusa/gstreamer-vaapi,gbeauchesne/gstreamer-vaapi,GStreamer/gstreamer-vaapi,CapOM/gstreamer-vaapi,01org/iotg-lin-gfx-gstreamer-vaapi