ffmpeg: update to ffmpeg-2.4.4

Signed-off-by: Stephan Raue <stephan@openelec.tv>
libtool: update to libtool-2.4.4

Signed-off-by: Stephan Raue <stephan@openelec.tv>
kodi-audioencoder-flac: update to kodi-audioencoder-flac-a960eba

Signed-off-by: Stephan Raue <stephan@openelec.tv>
kodi-audioencoder-lame: update to kodi-audioencoder-lame-6f8384f

Signed-off-by: Stephan Raue <stephan@openelec.tv>
kodi-audioencoder-vorbis: update to kodi-audioencoder-vorbis-fa0de15

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