[LLVM up] Update for raw_fd_ostream change. This fixes a FIXME that
the Backend output should be done in binary mode.
 - I'd appreciate it if someone who has a Windows build could verify
   this.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@59221 91177308-0d34-0410-b5e6-96231b3b80d8
9 files changed