message: Use active thread id
diff: @@ -624,7 +624,7 @@ impl<'mir, 'tcx> Machine<'mir, 'tcx> for Evaluator<'mir, 'tcx> {
  Some(profiler.start_recording_interval_event_detached(
  name,
  EventId::from_label(name),
  - 0
  + ecx.get_active_thread().to_u32()
  ))
  } else {
  None
  