read config.json may failed caused by syntax error
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3
Merge pull request #8138 from MSOpenTech/wp8-v3.3

WP8 v3.3 bug fixes
[ci skip]
[ci skip]
performance improvement for lua runtime on Run mode
Merge pull request #8143 from cocoscodeide/v3

read config.json may failed caused by syntax error