debian.py: Fix check for MetaPackage.
debian.py: Fix check for MetaPackage.

flexVDI/cerbero,ikonst/cerbero,fluendo/cerbero,ylatuya/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,GStreamer/cerbero,justinjoy/cerbero,ramaxlo/cerbero,davibe/cerbero,davibe/cerbero,jackjansen/cerbero-2013,AlertMe/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,sdroege/cerbero,shoreflyer/cerbero,multipath-rtp/cerbero,atsushieno/cerbero,nirbheek/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,EricssonResearch/cerbero,multipath-rtp/cerbero,GStreamer/cerbero,ford-prefect/cerbero,ramaxlo/cerbero,brion/cerbero,nzjrs/cerbero,justinjoy/cerbero,ylatuya/cerbero,ford-prefect/cerbero,multipath-rtp/cerbero,shoreflyer/cerbero,jackjansen/cerbero,lubosz/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,nirbheek/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,brion/cerbero,ikonst/cerbero,flexVDI/cerbero,BigBrother-International/gst-cerbero,jackjansen/cerbero-2013,EricssonResearch/cerbero,jackjansen/cerbero-2013,OptoFidelity/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,BigBrother-International/gst-cerbero,superdump/cerbero,cee1/cerbero-mac,nzjrs/cerbero,flexVDI/cerbero,ford-prefect/cerbero,atsushieno/cerbero,fluendo/cerbero,centricular/cerbero,fluendo/cerbero,GStreamer/cerbero,flexVDI/cerbero,atsushieno/cerbero,OptoFidelity/cerbero,BigBrother-International/gst-cerbero,davibe/cerbero,nicolewu/cerbero,atsushieno/cerbero,shoreflyer/cerbero,AlertMe/cerbero,centricular/cerbero,cee1/cerbero-mac,nicolewu/cerbero,nirbheek/cerbero-old,GStreamer/cerbero,ramaxlo/cerbero,shoreflyer/cerbero,superdump/cerbero,flexVDI/cerbero,ikonst/cerbero,EricssonResearch/cerbero,cee1/cerbero-mac,brion/cerbero,sdroege/cerbero,ramaxlo/cerbero,centricular/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,OptoFidelity/cerbero,lubosz/cerbero,OptoFidelity/cerbero,ikonst/cerbero,fluendo/cerbero,justinjoy/cerbero,ylatuya/cerbero,brion/cerbero,ramaxlo/cerbero,atsushieno/cerbero,nirbheek/cerbero-old,sdroege/cerbero,GStreamer/cerbero,sdroege/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,jackjansen/cerbero-2013,jackjansen/cerbero-2013,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,shoreflyer/cerbero,multipath-rtp/cerbero,nirbheek/cerbero-old,nirbheek/cerbero,centricular/cerbero,brion/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,justinjoy/cerbero,BigBrother-International/gst-cerbero,multipath-rtp/cerbero,superdump/cerbero,BigBrother-International/gst-cerbero,ford-prefect/cerbero,AlertMe/cerbero,jackjansen/cerbero,jackjansen/cerbero,AlertMe/cerbero,sdroege/cerbero,nzjrs/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,cee1/cerbero-mac,centricular/cerbero,lubosz/cerbero,jackjansen/cerbero,AlertMe/cerbero,nzjrs/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,davibe/cerbero,nirbheek/cerbero-old,nzjrs/cerbero,EricssonResearch/cerbero,ikonst/cerbero,lubosz/cerbero,ylatuya/cerbero,nirbheek/cerbero,fluendo/cerbero,superdump/cerbero,EricssonResearch/cerbero,nicolewu/cerbero