What's the recommend Git structure for project created by create-multi-platform-projects.py

Hi,
I want to know what’s the recommend Git structure for project created by create-multi-platform-projects.py?
Add new project to cocos2d-x submodule?
Add cocos2d-x to new project’s submodule (Is it possable to add submodule in parent directory)?
Or just use two separate git repository?
Thanks