fixed #3501: Modify sprite's draw for better performance.
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into Iss3501_ReleaseV2.2.2
Merge pull request #1435 from dingpinglv/Iss3501_ReleaseV2.2.2

fixed #3501: Modify sprite's draw for better performance.