XCode升级更新后，UUID会更新，所有插件会报以下错误，包括unity4xc，虽然不影响发布，但还是处理一下较好
xcodebuild[2956:104580] [MT] PluginLoading: Required plug-in compatibility UUID 7FDF5C7A-131F-4ABB-9EDC-8C5F8F0B8A90 for plug-in at path '~/Library/Application Support/Developer/Shared/Xcode/Plug-ins/Unity4XC.xcplugin' not present in DVTPlugInCompatibilityUUIDs
国外坛子里淘回来的，比较有效，记录一下打开Terminal执行以下两条语句：
1. XCODEUUID=`defaults read /Applications/Xcode.app/Contents/Info DVTPlugInCompatibilityUUID`
2. for f in ~/Library/Application\ Support/Developer/Shared/Xcode/Plug-ins/*; do defaults write "$f/Contents/Info" DVTPlugInCompatibilityUUIDs -array-add $XCODEUUID; done