ndk-build: Make some more functions static
ndk-build: Make some more functions static

justinjoy/cerbero,sdroege/cerbero,jackjansen/cerbero,sdroege/cerbero,justinjoy/cerbero,multipath-rtp/cerbero,nirbheek/cerbero,GStreamer/cerbero,centricular/cerbero,OptoFidelity/cerbero,flexVDI/cerbero,EricssonResearch/cerbero,jackjansen/cerbero,fluendo/cerbero,shoreflyer/cerbero,centricular/cerbero,atsushieno/cerbero,fluendo/cerbero,OptoFidelity/cerbero,shoreflyer/cerbero,justinjoy/cerbero,multipath-rtp/cerbero,EricssonResearch/cerbero,sdroege/cerbero,atsushieno/cerbero,fluendo/cerbero,flexVDI/cerbero,EricssonResearch/cerbero,nirbheek/cerbero,justinjoy/cerbero,sdroege/cerbero,flexVDI/cerbero,OptoFidelity/cerbero,GStreamer/cerbero,centricular/cerbero,GStreamer/cerbero,shoreflyer/cerbero,nirbheek/cerbero,multipath-rtp/cerbero,OptoFidelity/cerbero,flexVDI/cerbero,EricssonResearch/cerbero,atsushieno/cerbero,multipath-rtp/cerbero,GStreamer/cerbero,shoreflyer/cerbero,multipath-rtp/cerbero,EricssonResearch/cerbero,flexVDI/cerbero,shoreflyer/cerbero,jackjansen/cerbero,atsushieno/cerbero,jackjansen/cerbero,GStreamer/cerbero,fluendo/cerbero,centricular/cerbero,atsushieno/cerbero,fluendo/cerbero,nirbheek/cerbero,sdroege/cerbero,centricular/cerbero