add netspeak gsm and truespeech wav format tags to riff.c

Originally committed as revision 21797 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/riff.c

@@ -277,6 +277,8 @@ const AVCodecTag ff_codec_wav_tags[] = {
     { CODEC_ID_ADPCM_CT,        0x0200 },
     { CODEC_ID_ATRAC3,          0x0270 },
     { CODEC_ID_IMC,             0x0401 },
+    { CODEC_ID_GSM_MS,          0x1500 },
+    { CODEC_ID_TRUESPEECH,      0x1501 },
     { CODEC_ID_AC3,             0x2000 },
     { CODEC_ID_DTS,             0x2001 },
     { CODEC_ID_SONIC,           0x2048 },