[AUTO]: updating luabinding automatically
Fixed possible crash if invoking FontAtlasCache::purgeCachedData.
Merge pull request #6045 from CocosRobot/update_lua_bindings_1395994765

[AUTO]: updating luabinding automatically
Merge pull request #6046 from Dhilan007/develop_label

Fixed possible crash if invoking FontAtlasCache::purgeCachedData.
Update CHANGELOG [ci skip]
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into develop