Make test independent of scheduling

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199055 91177308-0d34-0410-b5e6-96231b3b80d8
raw_fd_ostream: Don't change STDERR to O_BINARY, or w*printf() (in assert()) would barf wide chars after llvm::errs().

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199057 91177308-0d34-0410-b5e6-96231b3b80d8