Backed out cls's change. When realclean is added to the list, the Tinderbox builds fail because they generate the Makefiles in webshell/embed/gtk, and then the realclean (aka distclean) deletes them. That's bad....

webshell/embed/Makefile.in

@@ -37,7 +37,7 @@ libs::
 install::
 	@cd gtk && $(MAKE) install && cd ..
 
-clean clobber realclean distclean::
+clean clobber distclean::
 	@cd gtk && $(MAKE) distclean && cd ..
 endif