Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
// RUN: %clang_cc1 -triple x86_64-unknown-unknown -fobjc-runtime=macosx-fragile-10.5 -emit-llvm -o %t %s @interface NSObject @end @implementation NSObject(IBXLIFFIntegration) @end