fix building in separate directory

Originally committed as revision 4509 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/Makefile

@@ -234,7 +234,7 @@ OBJS+= liba52/bit_allocate.o liba52/bitstream.o liba52/downmix.o \
 endif
 endif
 
-EXTRALIBS += -L$(SRC_PATH)/libavutil -lavutil$(BUILDSUF)
+EXTRALIBS += -L../libavutil -lavutil$(BUILDSUF)
 
 # currently using libdts for dts decoding
 ifeq ($(CONFIG_DTS),yes)

libavformat/Makefile

@@ -56,7 +56,7 @@ ifeq ($(CONFIG_AUDIO_OSS),yes)
 OBJS+= audio.o 
 endif
 
-EXTRALIBS += -L$(SRC_PATH)/libavutil -lavutil$(BUILDSUF)
+EXTRALIBS += -L../libavutil -lavutil$(BUILDSUF)
 
 ifeq ($(CONFIG_AUDIO_BEOS),yes)
 PPOBJS+= beosaudio.o