Saleel Kudchadker
42625f0527
Crash was due to the fact that external signal structure was stale even
after destroyign the command. That is because we skipped wait due to a
missing check.
Detect external signals and dispatch a barrier in ReleaseGpuMemoryFence.
Also clear external_signals_ at ProfilingBegin.
Change-Id: I991387edcfe928b511bf5e780988ee131321ed5a
[ROCm/clr commit: 3239222516]