cerbero: Disable debian packaging for now
cerbero: Disable debian packaging for now

People keep tripping over this and opening issues. Point people to the
existing issue in a warning and generate tarballs instead.

GStreamer/cerbero,GStreamer/cerbero,GStreamer/cerbero,nirbheek/cerbero,nirbheek/cerbero,nirbheek/cerbero,nirbheek/cerbero,GStreamer/cerbero,GStreamer/cerbero