Rename config.host_os to config.target_os.#149015

pcc merged 1 commit intomainllvm/llvm-project:mainfrom

users/pcc/spr/rename-confighost_os-to-configtarget_osllvm/llvm-project:users/pcc/spr/rename-confighost_os-to-configtarget_osCopy head branch name to clipboard