cmake: Update to 2.8.12 to fix build with OSX Mavericks
cmake: Update to 2.8.12 to fix build with OSX Mavericks

nirbheek/cerbero-old,sdroege/cerbero,sdroege/cerbero,AlertMe/cerbero,ylatuya/cerbero,nirbheek/cerbero,EricssonResearch/cerbero,EricssonResearch/cerbero,atsushieno/cerbero,superdump/cerbero,ford-prefect/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,ford-prefect/cerbero,davibe/cerbero,shoreflyer/cerbero,AlertMe/cerbero,AlertMe/cerbero,ramaxlo/cerbero,OptoFidelity/cerbero,ramaxlo/cerbero,centricular/cerbero,OptoFidelity/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,ford-prefect/cerbero,atsushieno/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,superdump/cerbero,superdump/cerbero,OptoFidelity/cerbero,multipath-rtp/cerbero,AlertMe/cerbero,brion/cerbero,shoreflyer/cerbero,nzjrs/cerbero,flexVDI/cerbero,nirbheek/cerbero,brion/cerbero,lubosz/cerbero,lubosz/cerbero,nzjrs/cerbero,sdroege/cerbero,flexVDI/cerbero,lubosz/cerbero,ylatuya/cerbero,nzjrs/cerbero,justinjoy/cerbero,centricular/cerbero,nirbheek/cerbero-old,atsushieno/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,ikonst/cerbero,fluendo/cerbero,nirbheek/cerbero-old,fluendo/cerbero,atsushieno/cerbero,sdroege/cerbero,shoreflyer/cerbero,GStreamer/cerbero,fluendo/cerbero,brion/cerbero,nzjrs/cerbero,shoreflyer/cerbero,ramaxlo/cerbero,justinjoy/cerbero,jackjansen/cerbero,brion/cerbero,ramaxlo/cerbero,fluendo/cerbero,EricssonResearch/cerbero,ikonst/cerbero,jackjansen/cerbero,nirbheek/cerbero-old,flexVDI/cerbero,flexVDI/cerbero,EricssonResearch/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,multipath-rtp/cerbero,multipath-rtp/cerbero,ramaxlo/cerbero,brion/cerbero,ylatuya/cerbero,davibe/cerbero,ikonst/cerbero,GStreamer/cerbero,davibe/cerbero,flexVDI/cerbero,GStreamer/cerbero,OptoFidelity/cerbero,superdump/cerbero,GStreamer/cerbero,davibe/cerbero,GStreamer/cerbero,multipath-rtp/cerbero,fluendo/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,ylatuya/cerbero,nirbheek/cerbero,shoreflyer/cerbero,justinjoy/cerbero,jackjansen/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,nzjrs/cerbero,justinjoy/cerbero,ford-prefect/cerbero,ikonst/cerbero,AlertMe/cerbero,nirbheek/cerbero,jackjansen/cerbero,centricular/cerbero,sdroege/cerbero,atsushieno/cerbero,centricular/cerbero,multipath-rtp/cerbero,ikonst/cerbero,lubosz/cerbero,centricular/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,EricssonResearch/cerbero