gst-ffmpeg: fix ios build for ARM and x86
gst-ffmpeg: fix ios build for ARM and x86

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