openjpeg: Also build the pkg-config file on non-UNIX
openjpeg: Also build the pkg-config file on non-UNIX

flexVDI/cerbero,atsushieno/cerbero,EricssonResearch/cerbero,fluendo/cerbero,justinjoy/cerbero,GStreamer/cerbero,centricular/cerbero,atsushieno/cerbero,atsushieno/cerbero,GStreamer/cerbero,centricular/cerbero,OptoFidelity/cerbero,centricular/cerbero,OptoFidelity/cerbero,fluendo/cerbero,GStreamer/cerbero,nirbheek/cerbero,EricssonResearch/cerbero,flexVDI/cerbero,justinjoy/cerbero,EricssonResearch/cerbero,nirbheek/cerbero,OptoFidelity/cerbero,centricular/cerbero,GStreamer/cerbero,fluendo/cerbero,nirbheek/cerbero,fluendo/cerbero,flexVDI/cerbero,EricssonResearch/cerbero,fluendo/cerbero,EricssonResearch/cerbero,justinjoy/cerbero,flexVDI/cerbero,atsushieno/cerbero,GStreamer/cerbero,centricular/cerbero,atsushieno/cerbero,flexVDI/cerbero,nirbheek/cerbero,OptoFidelity/cerbero,justinjoy/cerbero