Add an additional AAC TwoCC.

Mentioned on http://msdn.microsoft.com/en-us/library/dd341376%28prot.20%29.aspx
Originally committed to vlc by Jean-Baptiste.

libavformat/riff.c

@@ -374,6 +374,7 @@ const AVCodecTag ff_codec_wav_tags[] = {
     { AV_CODEC_ID_AAC,             0x706d },
     { AV_CODEC_ID_AAC,             0x4143 },
     { AV_CODEC_ID_G723_1,          0xA100 },
+    { AV_CODEC_ID_AAC,             0xA106 },
     { AV_CODEC_ID_SPEEX,           0xA109 },
     { AV_CODEC_ID_FLAC,            0xF1AC },
     { AV_CODEC_ID_ADPCM_SWF,       ('S'<<8)+'F' },