And also don't optimize the case where start==stop event to compute
elapsed time since the command can be a NDRange one.
HIP directed test will need to be fixed for that.
Change-Id: I64fadd6ab8ab1a490e7a2b7165a591df5a5cf3a2
hipEventRecord should always create a new marker so it can track work going on at the time the API is called.
Change-Id: I10ce98044be894fbacab8798441ec3d3f2753b93
Christophe Paquot
Laurent Morichetti