Fix Aql Header initialization

Change-Id: If23c12b28d22fb62b673038890f40bb0f3c3948b

rocrtst/common/base_rocr_utils.cc

@@ -375,8 +375,11 @@ hsa_status_t InitializeAQLPacket(const BaseRocR* test,
   if (aql == nullptr) {
     return HSA_STATUS_ERROR;
   }
-
-  aql->header = 0;   // Set this right before doorbell ring
+  
+  // Initialize Packet type as Invalid
+  // Update packet type to Kernel Dispatch
+  // right before ringing doorbell
+  aql->header = 1;
 
   aql->setup = 1;
   aql->workgroup_size_x = 256;