Add missing dependency of the S/PDIF muxer on the AAC parser.

Fixes build with --disable-parsers.

Originally committed as revision 20328 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/Makefile

@@ -466,6 +466,7 @@ OBJS-$(CONFIG_NUT_MUXER)               += mpegaudiodata.o
 OBJS-$(CONFIG_OGG_DEMUXER)             += flacdec.o flacdata.o flac.o
 OBJS-$(CONFIG_OGG_MUXER)               += xiph.o flacdec.o flacdata.o flac.o
 OBJS-$(CONFIG_RTP_MUXER)               += mpegvideo.o
+OBJS-$(CONFIG_SPDIF_MUXER)             += aac_parser.o aac_ac3_parser.o
 
 # external codec libraries
 OBJS-$(CONFIG_LIBDIRAC_DECODER)           += libdiracdec.o