[AUTO][ci skip]: updating cocos2dx_files.json
Merge pull request #7416 from CocosRobot/update_lua_bindings_1405076187

[AUTO]: updating luabinding automatically
Merge pull request #7419 from CocosRobot/update_cocosfiles_1405077070

[AUTO][ci skip]: updating cocos2dx_files.json
Fix setup.py that can't deal with symlink when setup environment variables
Refactor setup.py reuse some of the code
Merge pull request #7421 from darkdukey/fix_setup_script

Fix setup.py can't resolve symlink