运行脚本后报错：
xcrun: error: unable to find utility "PackageApplication", not a developer tool or in PATH
Xcode升级到9.0后 用命令进行打包 提示下面这个错误
xcrun: error: unable to find utility "PackageApplication", not a developer tool or in PATH
后面根据对比发现新版的Xcode少了这个PackageApplication
先去找个旧版的Xcode里面copy一份过来
放到下面这个目录：
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/
然后执行命令
sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer/
chmod +x /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/PackageApplication
然后删除原有build文件，重新打包
最后附上PackageApplication下载地址：
链接: https://pan.baidu.com/s/1slG6C2p 密码: vcn4
