avformat/nutdec: fix isom and mpa build deps

Fixes the following link error:
  nutdec.c:(.text+0x2d47): undefined reference to `ff_codec_movvideo_tags'
  isom.c:(.text+0x332): undefined reference to `avpriv_mpeg4audio_get_config'
  isom.c:(.text+0x39e): undefined reference to `avpriv_mpa_freq_tab'

libavcodec/Makefile

@@ -709,6 +709,7 @@ OBJS-$(CONFIG_MPEGTS_MUXER)            += mpeg4audio.o
 OBJS-$(CONFIG_MPEGTS_DEMUXER)          += mpeg4audio.o mpegaudiodata.o
 OBJS-$(CONFIG_MXF_MUXER)               += dnxhddata.o
 OBJS-$(CONFIG_NUT_MUXER)               += mpegaudiodata.o
+OBJS-$(CONFIG_NUT_DEMUXER)             += mpegaudiodata.o mpeg4audio.o
 OBJS-$(CONFIG_OGA_MUXER)               += flac.o flacdata.o
 OBJS-$(CONFIG_OGG_DEMUXER)             += mpeg12data.o \
                                           dirac.o vorbis_data.o

libavformat/Makefile

@@ -283,7 +283,7 @@ OBJS-$(CONFIG_NC_DEMUXER)                += ncdec.o
 OBJS-$(CONFIG_NISTSPHERE_DEMUXER)        += nistspheredec.o pcm.o
 OBJS-$(CONFIG_NSV_DEMUXER)               += nsvdec.o
 OBJS-$(CONFIG_NULL_MUXER)                += nullenc.o
-OBJS-$(CONFIG_NUT_DEMUXER)               += nutdec.o nut.o
+OBJS-$(CONFIG_NUT_DEMUXER)               += nutdec.o nut.o isom.o
 OBJS-$(CONFIG_NUT_MUXER)                 += nutenc.o nut.o
 OBJS-$(CONFIG_NUV_DEMUXER)               += nuv.o
 OBJS-$(CONFIG_OGG_DEMUXER)               += oggdec.o         \