cerbero/fetch-cache: support macos builds
cerbero/fetch-cache: support macos builds

atsushieno/cerbero,GStreamer/cerbero,nirbheek/cerbero,atsushieno/cerbero,GStreamer/cerbero,atsushieno/cerbero,nirbheek/cerbero,atsushieno/cerbero,GStreamer/cerbero,GStreamer/cerbero,GStreamer/cerbero,nirbheek/cerbero,atsushieno/cerbero,nirbheek/cerbero