netclientclock: Add some copyright stuff
netclientclock: Add some copyright stuff

StreamUtils/gstreamer,jpxiong/gstreamer,krichter722/gstreamer,krichter722/gstreamer,StreamUtils/gstreamer,centricular/gstreamer,jpxiong/gstreamer,krichter722/gstreamer,krichter722/gstreamer,jpxiong/gstreamer,jpxiong/gstreamer,StreamUtils/gstreamer,centricular/gstreamer,krichter722/gstreamer,centricular/gstreamer,centricular/gstreamer,StreamUtils/gstreamer,shelsonjava/gstreamer,centricular/gstreamer,StreamUtils/gstreamer,jpxiong/gstreamer,shelsonjava/gstreamer,shelsonjava/gstreamer,shelsonjava/gstreamer,shelsonjava/gstreamer