disc: add support for AVCHD 8.3 filenames
disc: add support for AVCHD 8.3 filenames

Azzuro/libbluray,ace20022/libbluray,ace20022/libbluray,ShiftMediaProject/libbluray,ace20022/libbluray,ShiftMediaProject/libbluray,Azzuro/libbluray,Azzuro/libbluray,tourettes/libbluray,tourettes/libbluray,Azzuro/libbluray,ShiftMediaProject/libbluray,tourettes/libbluray,tourettes/libbluray,ShiftMediaProject/libbluray,ace20022/libbluray