- make distclean didn't clean dialog binaries. Closes #1039

Makefile

@@ -133,6 +133,7 @@ ifeq ($(DL_DIR),$(BASE_DIR)/dl)
 	rm -rf $(DL_DIR)
 endif
 	rm -rf $(BUILD_DIR) $(LINUX_KERNEL) $(IMAGE)
+	$(MAKE) -C $(CONFIG) clean
 
 sourceball:
 	rm -rf $(BUILD_DIR)