closed #3727, In project "TestCpp", not pause/resume background music & effects when it's going to background/foreground.
Merge branch 'develop' of https://github.com/natural-law/cocos2d-x; branch 'develop' of https://github.com/cocos2d/cocos2d-x into develop
Merge pull request #5480 from natural-law/develop

Remove the music & effects controlling in AppDelegate.cpp of TestCpp