projects/RPi/patches/ffmpeg: add RPi specific patches

Signed-off-by: Stephan Raue <stephan@openelec.tv>
projects/RPi/patches/xbmc-master: add RPi specific patches

Signed-off-by: Stephan Raue <stephan@openelec.tv>
ffmpeg: make upstream patches generally avaible

Signed-off-by: Stephan Raue <stephan@openelec.tv>