remove all copies of the root fs on make target_clean

git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@1116 3c298f89-4303-0410-b956-a3cf2f4a3e73

Makefile

@@ -120,6 +120,7 @@ image_clean:
 	
 target_clean: image_clean
 	rm -rf $(TARGET_DIR)
+	rm -rf $(BUILD_DIR)/linux-*/root
 
 clean: target_clean
 	@$(MAKE) -C $(CONFIG) clean