medcom-wide/rootfs: Do not include L4T gstreamer support.

The webkit HTML5 video support uses its own video sink based on clutter, to
render the player ui using css and javascript. This plugin does not support
the caps exported from L4T omx plugins. So the pipeline can not be linked and
we can't use h/w acceleration or show the video with software decoding.

By stop package the omx plugins into the rootfs we can at least use software
decoding.

Signed-off-by: Soeren Grunewald <soeren.grunewald@avionic-design.de>
Reviewed-by: Julian Scheel <julian@jusst.de>