message: thread creation error for Windows
diff: @@ -725,8 +725,8 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
  this.write_null(dest)?;
  }
  - // We don't support threading.
  - "pthread_create" => {
  + // We don't support threading. (Also for Windows.)
  + "pthread_create" | "CreateThread" => {
  return err!(Unimplemented(format!("Miri does not support threading")));
  }
  