media recorder: add video rotation

contrib/src/ffmpeg/rules.mak

src/media/media_recorder.cpp

src/media/media_recorder.h

src/media/video/Makefile.am

src/media/video/filter_transpose.cpp

src/media/video/filter_transpose.h

src/media/video/sinkclient.cpp

src/media/video/video_input.cpp

src/media/video/video_input.h

src/media/video/video_receive_thread.cpp

src/media/video/video_receive_thread.h