MLCE-754 'Improve operator support error/warning from Arm NN Delegate'

* Improved error reporting on armnn_delegate

Signed-off-by: Sadik Armagan <sadik.armagan@arm.com>
Change-Id: I1bd131fb56d64b32b1fafad0465256178720226c
diff --git a/delegate/src/Slice.hpp b/delegate/src/Slice.hpp
index a237034..04b19cb 100644
--- a/delegate/src/Slice.hpp
+++ b/delegate/src/Slice.hpp
@@ -116,7 +116,7 @@
     bool isSupported = false;
     auto validateFunc = [&](const armnn::TensorInfo& outInfo, bool& isSupported)
     {
-        FORWARD_LAYER_SUPPORT_FUNC(__func__,
+        FORWARD_LAYER_SUPPORT_FUNC("SLICE",
                                    tfLiteContext,
                                    IsStridedSliceSupported,
                                    delegateData.m_Backends,