forgot to remove adx.o from objs always built

Originally committed as revision 5680 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/Makefile

@@ -15,7 +15,7 @@ OBJS= bitstream.o utils.o mem.o allcodecs.o \
       mpeg12.o mpegaudiodec.o simple_idct.o \
       ratecontrol.o eval.o error_resilience.o \
       fft.o mdct.o raw.o golomb.o cabac.o\
-      dpcm.o adx.o faandct.o parser.o \
+      dpcm.o faandct.o parser.o \
       vp3dsp.o h264idct.o rangecoder.o pnm.o h263.o msmpeg4.o h263dec.o \
       opt.o \
       bitstream_filter.o \