Add debug checking of time stamps validity.

Can only check that the signal has some time stamp, can't check if
the translating agent matches the last used agent or not.

Change-Id: I62943a864318808059c617280bb65a269dfadd1b


[ROCm/ROCR-Runtime commit: aca00b7238]

projects/rocr-runtime/runtime/hsa-runtime/core/runtime/amd_gpu_agent.cpp

@@ -1034,6 +1034,11 @@ void GpuAgent::TranslateTime(core::Signal* signal,
     SyncClocks();
   }
 
+  if ((signal->signal_.start_ts == 0) || (signal->signal_.end_ts == 0) ||
+      (signal->signal_.start_ts > t1_.GPUClockCounter) ||
+      (signal->signal_.end_ts > t1_.GPUClockCounter))
+    debug_print("Signal %p time stamps may be invalid.", &signal->signal_);
+
   time.start = uint64_t(
       (double(int64_t(t0_.SystemClockCounter - t1_.SystemClockCounter)) /
        double(int64_t(t0_.GPUClockCounter - t1_.GPUClockCounter))) *