Simplify compilation call by using $(EXTRALIBS).

Originally committed as revision 20038 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

libswscale/Makefile

@@ -23,7 +23,7 @@ HEADERS = swscale.h rgb2rgb.h
 include $(SRC_PATH)/common.mak
 
 cs_test: cs_test.c
-	$(CC) $(CFLAGS) -o $@ $^ -L. -lswscale -L$(SRC_PATH)/libavutil -lavutil -lm
+	$(CC) $(CFLAGS) -o $@ $^ -L. -lswscale $(EXTRALIBS)
 
 swscale-example: swscale-example.c
-	$(CC) $(CFLAGS) -o $@ $^ -L. -lswscale -L$(SRC_PATH)/libavutil -lavutil -lm
+	$(CC) $(CFLAGS) -o $@ $^ -L. -lswscale $(EXTRALIBS)