Add install_dir property
Add install_dir property

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