clutter-gstreamer: add video-sink sample for libclutter-gst 2.0.2
clutter-gstreamer: add video-sink sample for libclutter-gst 2.0.2

It works on Windows!

see:
https://git.gnome.org/browse/clutter-gst/tree/examples/video-sink.c?id=2.0.2

kitachro/ruby-gnome2,kitachro/ruby-gnome2,kitachro/ruby-gnome2,kitachro/ruby-gnome2,kitachro/ruby-gnome2