Reverted dangerous change that could remove /bin/sh :)

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%403554

Makefile.in

@@ -139,7 +139,7 @@ clean:
 distclean: clean
 	rm -f Makefile include/SDL_config.h sdl-config
 	rm -f SDL.qpg
-	rm -f config.status config.cache config.log $(LIBTOOL) $(depend)
+	rm -f config.status config.cache config.log libtool $(depend)
 	rm -rf $(srcdir)/autom4te*
 	find $(srcdir) \( \
 	    -name '*~' -o \