Build both static and shared libs from the same object.

This makes libpostproc consistent with all the other libraries.
patch by Diego 'Flameeyes' Pettenò, flameeyes gmail com


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@11526 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libpostproc/Makefile

@@ -12,15 +12,9 @@ LIBMAJOR=$(SPPMAJOR)
 
 HEADERS = postprocess.h
 
-include ../common.mak
-
-$(LIBNAME): postprocess.o
-$(SLIBNAME_WITH_MAJOR): postprocess_pic.o
+OBJS = postprocess.o
 
-depend dep: postprocess.c
-
-postprocess_pic.o: postprocess.c
-	$(CC) -c $(CFLAGS) -fomit-frame-pointer -fPIC -DPIC -o $@ $<
+include ../common.mak
 
 uninstall-headers::
 	-rmdir "$(prefix)/include/postproc"