Merge pull request #8584 from ricardoquesada/removes_3d_export

removes the `3d_export.h` file
[AUTO][ci skip]: updating cocos2dx_files.json
Merge pull request #8585 from CocosRobot/update_cocosfiles_1412820372

[AUTO][ci skip]: updating cocos2dx_files.json
Linux: fix glfw3 searching
Linux: make glfw3 visable to subprojects
Merge pull request #8590 from martell/linux

Linux: fix glfw3 searching