Update Cocos2d-x
Fixed #5567: [JSB] Take account of showFPS in project.json
Fixed #5567: [JSB] Remove log
Fixed #5534: Make NodeRGBA extendable in JSB
Fixed #5527: Refactor cc.fileUtils & cc.AssetsManager to jsb namespace
Fixed #5527: Refactor cc.fileUtils & cc.AssetsManager to jsb namespace
Merge pull request #481 from pandamicro/master

Update Cocos2d-x v3 develop, add jsb namespace and bug fixes