Upgrading to GLFW 3.1.2

Could you please upgrade the GLFW dependency to version 3.1.2? It contains my fix for making the OpenGL context current (https://github.com/glfw/glfw/pull/487). Thank you!

EDIT: I just checked, that 3.1.2 is not out yet. Please upgrade to 3.1.2 whenever it is available or take it from the repository.

This is something you can do yourself. Fork the cocos2d-x repo, apply the update and then send a pull request. That way it’s much more likely to get done.

I have already created a pull request for this a few months earlier, but it was not merged into cocos2d-x repo. This is my second try.