4b443f8133
hipGetLastError should return the error by any of the previous APIs in the same host thread to match the CUDA behavior, whereas hipExtGetLastError will return the error by the immediate previous API. This Ext API was added earlier to facilitate the existing HIP apps which are following the current behavior of hipGetLastError Change-Id: I61e95b1fc136cc761e2434e02187b7ed2598b733