Bug#822315: ruby-clutter-gstreamer: depends on clutter-gst-2.0 which is going to be removed

[Emilio Pozuelo Monfort]

Package: ruby-clutter-gstreamer
Version: 2.2.5-4
Severity: important

clutter-gst-2.0 is superseeded by clutter-gst-3.0. Please switch to that or
drop this package, as we'll remove clutter-gst-2.0 before Stretch is released.

Emilio