Merge pull request #740 from pandamicro/develop

Fixed #5871: Bound constructor for cc.EventTouch and cc.Touch
Solve the problem: gdbserver is not copied to directory proj.android/libs when ndk-build with NDK_DEBUG=1.
Merge pull request #741 from natural-law/develop

Modify the Application.mk of project android.
issue #5824: enable CurrentLanguageTest for jsb
Merge pull request #742 from joshuastray/develop

issue #5824: enable CurrentLanguageTest for jsb
Issue #5829: modify LoaderTest.js for cc.async refactored.
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-js into Iss5829_JsDocs
Merge pull request #743 from dingpinglv/Iss5829_JsDocs

Issue #5829: modify LoaderTest.js for cc.async refactored.
Fixed #5872: Add CCConfig values into jsb
Issue #5873: Fix issues for test
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-js into develop
Issue #5873: Fix issues for test