please add CC_DLL for CCData class.

cocos2d-x C++
#1

hi, when i want to use the CCData in my project in VS. my linker can’t resolve it. please add CC_DLL for this class. thanks.

#2

Done, http://github.com/cocos2d/cocos2d-x/commit/0ab4ead04b60896c9b2aee3c383cc4de67e1706d
Thanks for your report.