gstreamer: 1.0.5

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
gst-ffmpeg: removed (replaced by gst-libav)

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
gstreamer: remove unrecognized configure options

Closes #17794.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>