MLCE-1092 Added layerNames to opaque delegate

 * All layers added through the opaque delegate will have a name that
   includes the nodeIndex from the tflite model.
 * Added utilities to OpaqueDelegateUtils to get the names for the layers.

Signed-off-by: Mike Kelly <mike.kelly@arm.com>
Change-Id: Iadcc21646d0b6fcc2c524d6239211ad3af6b6577
diff --git a/delegate/opaque/src/Lstm.hpp b/delegate/opaque/src/Lstm.hpp
index b896b46..439e401 100644
--- a/delegate/opaque/src/Lstm.hpp
+++ b/delegate/opaque/src/Lstm.hpp
@@ -266,7 +266,8 @@
         return isSupported ? kTfLiteOk : kTfLiteError;
     }
 
-    armnn::IConnectableLayer* layer = delegateData.m_Network->AddLstmLayer(desc, params);
+    auto layerName = GetName(armnn::LayerType::Lstm, nodeIndex);
+    armnn::IConnectableLayer* layer = delegateData.m_Network->AddLstmLayer(desc, params, layerName.c_str());
     layer->SetBackendId(setBackend);
     ARMNN_ASSERT(layer != nullptr);