Contribs: Update to vpx 1.3.0
avcodec: map Wing commander IV Xxan video

Sample: http://samples.mplayerhq.hu/game-formats/wc4-xan/wc4trailer.avi

Audio does not work for this sample; it is recognized as raw PCM instead
of the special Xan DPCM codec (the avformat AVI demuxer has a special
case for recognizing this audio codec that is not in the native VLC AVI
demux).

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
avcodec: map LCL MSZH and ZLIB

Samples:
http://samples.mplayerhq.hu/V-codecs/mszh-zlib/monika_mszh.avi
http://samples.mplayerhq.hu/V-codecs/mszh-zlib/monika_zlib.avi

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
avcodec: map GameCube THP video and audio

Sample:
http://samples.mplayerhq.hu/game-formats/thp/AfterCredits.thp

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
avcodec: map RenderWare TXD

Sample:
http://samples.mplayerhq.hu/game-formats/txd/fronten1.txd

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
avcodec: map PCX

Sample:
http://samples.mplayerhq.hu/image-samples/pcx/lena.pcx

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
avcodec: map Escape 124 video

Sample:
http://samples.mplayerhq.hu/game-formats/rpl/escape124/ESCAPE.RPL

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>