core: Update MR desc file to suit Rygel
core: Update MR desc file to suit Rygel

jku/rygel,luisbg/rygel,Tarnyko/rygel,Tarnyko/rygel,GNOME/rygel,Pelagicore/Media-Manager-Rygel-patched,GNOME/rygel,Pelagicore/Media-Manager-Rygel-patched,Pelagicore/Media-Manager-Rygel-patched,GNOME/rygel,jku/rygel