iOS 旧项目所需要的关键库
①在RuntimeRoot的lib里面增加libstdc++.6.0.9.dylib，libstdc++.6.dylib，libstdc++.dylib，路径如下：
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib
②在iPhoneOS.sdk的lib里面增加libstdc++.6.0.9.tbd，libstdc++.6.tbd，libstdc++.tbd，路径如下：
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib/
③在iPhoneSimulator.sdk的lib里面增加libstdc++.6.
