riff: Support ULH0 and ULH2 fourccs.

Signed-off-by: Kostya Shishkov <kostya.shishkov@gmail.com>

libavformat/riff.c

@@ -302,6 +302,8 @@ const AVCodecTag ff_codec_bmp_tags[] = {
     { AV_CODEC_ID_UTVIDEO,      MKTAG('U', 'L', 'R', 'G') },
     { AV_CODEC_ID_UTVIDEO,      MKTAG('U', 'L', 'Y', '0') },
     { AV_CODEC_ID_UTVIDEO,      MKTAG('U', 'L', 'Y', '2') },
+    { AV_CODEC_ID_UTVIDEO,      MKTAG('U', 'L', 'H', '0') },
+    { AV_CODEC_ID_UTVIDEO,      MKTAG('U', 'L', 'H', '2') },
     { AV_CODEC_ID_VBLE,         MKTAG('V', 'B', 'L', 'E') },
     { AV_CODEC_ID_DXTORY,       MKTAG('x', 't', 'o', 'r') },
     { AV_CODEC_ID_ZEROCODEC,    MKTAG('Z', 'E', 'C', 'O') },