bench-timing: aborted computation clear event before sleeping

app/benchmark/timing/aborted-computation.cc

@@ -16,6 +16,7 @@ extern "C" {
     void timing_entry() {
         timing_start(0);
         ActivateTask(Computation);
+        ClearEvent(ComputationFinished | ComputationAborted);
         WaitEvent(ComputationFinished | ComputationAborted);
         timing_end(TIMING_POINT_NO_INTERRUPTS_IN_BLOCK | 0);
     }