Also 'clean' in 'distclean' target.

Author: petterreinholdtsen

src/Makefile

@@ -508,7 +508,7 @@ inclean:
 headersclean:
 	$(RM) $(HEADERS)
 clean: docclean pythonclean cscopeclean headersclean
-distclean: inclean
+distclean: clean inclean
 
 # This is the gateway into the crazy world of "kbuild", the linux 2.6 system
 # for building kernel modules.	Other kernel module build styles need to be