Bug 310732 - /bin/sh: -c: line 1: syntax error near unexpected token `;'

/bin/sh: -c: line 1: `for d in ; do   /boot/home/config/bin/make -C $d libs;  done' - patch by tqh <thesuckiestemail@yahoo.se> r=me

config/rules.mk

@@ -617,10 +617,12 @@ export:: $(SUBMAKEFILES) $(MAKE_DIRS)
 
 tools:: $(SUBMAKEFILES) $(MAKE_DIRS)
 	+$(LOOP_OVER_DIRS)
+ifdef TOOL_DIRS
 	@for d in $(TOOL_DIRS); do \
 	    $(UPDATE_TITLE) \
 	    $(MAKE) -C $$d libs; \
 	done
+endif
 
 #
 # Rule to create list of libraries for final link