CocosBuilderTest needs to be js controlled in both cocos2d-html5 and cocos2d-x JSB

Before this change, it's also `c++ controlled` in `cocos2d-htm5`.
IMHO, It's better to use just one strategy, which I mean `js controlled`, in `cocos2d-html5`.

Please review and merge as soon as possible. It's tested ok both on `JSB` and `cocos2d-html5`.