PhysicsEditor GB2ShapeCache-x helper class's updated to use cocos2d-x-3.0alpha1

[meiry]

Hey ,

i noticed the helper class's are for version 2 so i updated it to use version cocos2d-x-3.0alpha1

you can find the fix here :
http://www.cocos2d-x.org/forums/18/topics/41482