gstreamer: fix windows cross-compilation
gstreamer: fix windows cross-compilation

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