SWDEV-382397 - Add hipStreamSynchronize() (#166)

Make sure the queue is done before exit.

Change-Id: I1011514211d665d3e1f0e93abcc38f08b2e3c375

catch/unit/event/Unit_hipEventElapsedTime.cc

@@ -106,6 +106,7 @@ TEST_CASE("Unit_hipEventElapsedTime_NotReady_Negative") {
   HIP_CHECK_ERROR(hipEventQuery(stop), hipErrorNotReady);
   HIP_ASSERT(hipEventElapsedTime(&tElapsed,start,stop) == hipErrorNotReady);
 
+  HIP_CHECK(hipStreamSynchronize(nullptr));
   HIP_CHECK(hipEventDestroy(start));
   HIP_CHECK(hipEventDestroy(stop));
 }