[v3.0 beta release] Update submodules
Update cocos2d-x
Feature #5253: Fix a bug in JSB AssetsManagerTest
Feature #5335: Fix a bug of LabelBMFont usage
Update Cocos2d-x
Feature #5253: Make JSB AssetsManager test use writablepath
Feature #5253: Fix an path issue in AssetsManagerTest
Merge pull request #418 from pandamicro/master

[v3.0 beta release] Update submodules