Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
// RUN: rm -rf %t // RUN: %clang_cc1 -verify -fmodules -fimplicit-module-maps -x c++ -emit-module -fmodules-cache-path=%t -fmodule-name=c_library_bad %S/Inputs/module.map