swift

4d770012 - [Frontend] Do not output swiftinterface when there has been errors

[Frontend] Do not output swiftinterface when there has been errors When allowing errors with -experimental-allow-module-with-compiler-errors, do not output the .swiftinterface when there has been errors. There's no real need to output them for invalid modules, so this avoids module interface printing having to have checks for normally-impossible cases. Resolves rdar://78039608.