IVGCVSW-6453 'Move the ArmNN Test Utils code to a physically separate directory'

* Created include/armnnTestUtils directory
* Moved Arm NN test utils files into armnnTestUtils directory

Signed-off-by: Sadik Armagan <sadik.armagan@arm.com>
Change-Id: I03ac54c645c41c52650c4c03b6a58fb1481fef5d
diff --git a/src/backends/reference/test/RefLayerSupportTests.cpp b/src/backends/reference/test/RefLayerSupportTests.cpp
index 1adc54e..f0eb62f 100644
--- a/src/backends/reference/test/RefLayerSupportTests.cpp
+++ b/src/backends/reference/test/RefLayerSupportTests.cpp
@@ -5,7 +5,8 @@
 
 #include <layers/ConvertFp16ToFp32Layer.hpp>
 #include <layers/ConvertFp32ToFp16Layer.hpp>
-#include <test/TensorHelpers.hpp>
+
+#include <TensorHelpers.hpp>
 
 #include <backendsCommon/TensorHandle.hpp>
 #include <reference/RefWorkloadFactory.hpp>