cocos2d-x-lite版本3.9，cocos creator版本1.9.3
运行gulp gen-simulator脚本报错，提示更新XCode版本。
打印如下：
MacBook-Pro:cocos2d-x-lite admin$ gulp gen-simulator
[19:28:40] Using gulpfile ~/Documents/git/cocos2d-x-lite/gulpfile.js
[19:28:40] Starting ‘gen-simulator’…
正在执行：‘mkdir -p /Users/admin/Documents/git/cocos2d-x-lite/tools/simulator/src && “python” “/Users/admin/Documents/git/cocos2d-x-lite/tools/cocos2d-console/bin/cocos.py” compile -p mac -m debug -o “/Users/admin/Documents/git/cocos2d-x-lite/simulator/mac” --no-res --compile-script 0’
编译模式：debug
请更新 XCode 版本。
执行命令出错，返回值：17。
[19:28:42] ‘gen-simulator’ errored after 1.5 s
[19:28:42] Error: Generate simulator failed
at formatError (/usr/local/lib/node_modules/gulp/bin/gulp.js:169:10)
at Gulp. (/usr/local/lib/node_modules/gulp/bin/gulp.js:195:15)
at emitOne (events.js:96:13)
at Gulp.emit (events.js:188:7)
at Gulp.Orchestrator._emitTaskDone (/Users/admin/Documents/git/cocos2d-x-lite/node_modules/orchestrator/index.js:264:8)
at /Users/admin/Documents/git/cocos2d-x-lite/node_modules/orchestrator/index.js:275:23
at finish (/Users/admin/Documents/git/cocos2d-x-lite/node_modules/orchestrator/lib/runTask.js:21:8)
at cb (/Users/admin/Documents/git/cocos2d-x-lite/node_modules/orchestrator/lib/runTask.js:29:3)
at ChildProcess.child.on (/Users/admin/Documents/git/cocos2d-x-lite/gulpfile.js:171:17)
at emitTwo (events.js:106:13)
