external: delete output of built, Make.dep at distclean
The Make.dep is an output of built so that it should be clean when
we execute "make distclean".
@@ -132,6 +132,7 @@ clean: $(foreach SDIR, $(BUILDIRS), $(SDIR)_clean) iotivity_clean
distclean: $(foreach SDIR, $(BUILDIRS), $(SDIR)_distclean)
$(call DELFILE, .depend)
+ $(call DELFILE, Make.dep)
$(call DELFILE, $(BIN))
$(call CLEAN)
