rename FR_SET_BUF to AST_FRAME_SET_BUFFER

formats/format_g723.c

formats/format_g726.c

formats/format_g729.c

formats/format_gsm.c

formats/format_h263.c

formats/format_h264.c

formats/format_ilbc.c

formats/format_ogg_vorbis.c

formats/format_pcm.c

formats/format_sln.c

formats/format_vox.c

formats/format_wav.c

formats/format_wav_gsm.c

include/asterisk/frame.h