IVGCVSW-3813 Add Unary Elementwise Operation 'NEG' support to the android-nn-driver

* Implemented ClNegWorkload
* Implemented NeonNegWorkload
* Enabled 'NEG' operator on CL and Neon as well as Ref
* Implemented unit tests for 'NEG' operator

Signed-off-by: Sadik Armagan <sadik.armagan@arm.com>
Change-Id: I3d7a892692716636cae6bdf8ddd238e3d1ea064f
diff --git a/src/backends/backendsCommon/test/LayerTests.hpp b/src/backends/backendsCommon/test/LayerTests.hpp
index 600a261..247ed12 100644
--- a/src/backends/backendsCommon/test/LayerTests.hpp
+++ b/src/backends/backendsCommon/test/LayerTests.hpp
@@ -37,6 +37,7 @@
 #include <backendsCommon/test/layerTests/MeanTestImpl.hpp>
 #include <backendsCommon/test/layerTests/MinimumTestImpl.hpp>
 #include <backendsCommon/test/layerTests/MultiplicationTestImpl.hpp>
+#include <backendsCommon/test/layerTests/NegTestImpl.hpp>
 #include <backendsCommon/test/layerTests/NormalizationTestImpl.hpp>
 #include <backendsCommon/test/layerTests/PadTestImpl.hpp>
 #include <backendsCommon/test/layerTests/PermuteTestImpl.hpp>