Fix gcc 13 compiler errors

* Resolves MLCE-1040

Change-Id: I32878ed70af356832403e83dcb63b0b89a8a84e3
Signed-off-by: Pablo Marquez Tello <pablo.tello@arm.com>
diff --git a/src/armnnUtils/VerificationHelpers.hpp b/src/armnnUtils/VerificationHelpers.hpp
index be09ba9..508cdc0 100644
--- a/src/armnnUtils/VerificationHelpers.hpp
+++ b/src/armnnUtils/VerificationHelpers.hpp
@@ -1,11 +1,11 @@
 //
-// Copyright © 2017 Arm Ltd. All rights reserved.
+// Copyright © 2017,2023 Arm Ltd and Contributors. All rights reserved.
 // SPDX-License-Identifier: MIT
 //
 
 #include <iostream>
 #include <sstream>
-
+#include <cstdint>
 #include <armnn/Exceptions.hpp>
 
 namespace armnnUtils