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/cl/workloads/ClWorkloads.hpp b/src/backends/cl/workloads/ClWorkloads.hpp
index ec193d5..c7c0163 100644
--- a/src/backends/cl/workloads/ClWorkloads.hpp
+++ b/src/backends/cl/workloads/ClWorkloads.hpp
@@ -27,6 +27,7 @@
 #include "ClMeanWorkload.hpp"
 #include "ClMinimumWorkload.hpp"
 #include "ClMultiplicationWorkload.hpp"
+#include "ClNegWorkload.hpp"
 #include "ClNormalizationFloatWorkload.hpp"
 #include "ClPermuteWorkload.hpp"
 #include "ClPadWorkload.hpp"