Detect memory event through Flags field insetad of Failure

KFD no longer reports MemoryAccessFault.Failure with retry fault
implementation. ROCr ignores the memory event when Failure = 0.

Use the Flags field instead, which will be non-zero when the
event is triggered.

Change-Id: Ie90799a303b0b2f1b476b20ffafdde79ae137182

runtime/hsa-runtime/core/runtime/signal.cpp

@@ -253,9 +253,7 @@ uint32_t Signal::WaitAny(uint32_t signal_count, const hsa_signal_t* hsa_signals,
         if (event_type == HSA_EVENTTYPE_MEMORY) {
           const HsaMemoryAccessFault& fault =
               signals[i]->EopEvent()->EventData.EventData.MemoryAccessFault;
-          const uint32_t* failure =
-              reinterpret_cast<const uint32_t*>(&fault.Failure);
-          if (*failure != 0) {
+          if (fault.Flags == HSA_EVENTID_MEMORY_FATAL_PROCESS) {
             return i;
           }
         }