Fix MP2 muxer Makefile dependencies.

Found, analysed and tested by trac user Jamal.

Fixes ticket #1411

libavcodec/Makefile

@@ -626,6 +626,7 @@ OBJS-$(CONFIG_MATROSKA_DEMUXER)        += mpeg4audio.o mpegaudiodata.o
 OBJS-$(CONFIG_MATROSKA_MUXER)          += xiph.o mpeg4audio.o \
                                           flacdec.o flacdata.o flac.o \
                                           mpegaudiodata.o vorbis_data.o
+OBJS-$(CONFIG_MP2_MUXER)               += mpegaudiodata.o mpegaudiodecheader.o
 OBJS-$(CONFIG_MP3_MUXER)               += mpegaudiodata.o mpegaudiodecheader.o
 OBJS-$(CONFIG_MOV_DEMUXER)             += mpeg4audio.o mpegaudiodata.o ac3tab.o timecode.o
 OBJS-$(CONFIG_MOV_MUXER)               += mpeg4audio.o mpegaudiodata.o

libavformat/Makefile

@@ -163,7 +163,7 @@ OBJS-$(CONFIG_MOV_DEMUXER)               += mov.o isom.o mov_chan.o
 OBJS-$(CONFIG_MOV_MUXER)                 += movenc.o isom.o avc.o \
                                             movenchint.o rtpenc_chain.o \
                                             mov_chan.o
-OBJS-$(CONFIG_MP2_MUXER)                 += mp3enc.o rawenc.o
+OBJS-$(CONFIG_MP2_MUXER)                 += mp3enc.o rawenc.o id3v2enc.o
 OBJS-$(CONFIG_MP3_DEMUXER)               += mp3dec.o
 OBJS-$(CONFIG_MP3_MUXER)                 += mp3enc.o rawenc.o id3v2enc.o
 OBJS-$(CONFIG_MPC_DEMUXER)               += mpc.o apetag.o