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/CMakeLists.txt b/src/backends/backendsCommon/test/CMakeLists.txt
index bfaca6c..bfd44ef 100644
--- a/src/backends/backendsCommon/test/CMakeLists.txt
+++ b/src/backends/backendsCommon/test/CMakeLists.txt
@@ -113,6 +113,8 @@
     layerTests/MinimumTestImpl.hpp
     layerTests/MultiplicationTestImpl.cpp
     layerTests/MultiplicationTestImpl.hpp
+    layerTests/NegTestImpl.cpp
+    layerTests/NegTestImpl.hpp
     layerTests/NormalizationTestImpl.cpp
     layerTests/NormalizationTestImpl.hpp
     layerTests/PadTestImpl.cpp