Make all CL Concatenate kernels and functions state-less

Resolves COMPMID-3995

Change-Id: I84172bed20924f1d9ae3b4d14d7b321e9494296e
Signed-off-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4887
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
diff --git a/SConscript b/SConscript
index 8b8e504..121cf32 100644
--- a/SConscript
+++ b/SConscript
@@ -212,11 +212,15 @@
     core_files += Glob('src/core/CL/gemm/native/*.cpp')
     core_files += Glob('src/core/CL/gemm/reshaped/*.cpp')
     core_files += Glob('src/core/CL/gemm/reshaped_only_rhs/*.cpp')
+    core_files += Glob('src/core/gpu/cl/*.cpp')
+    core_files += Glob('src/core/gpu/cl/kernels/*.cpp')
 
     runtime_files += Glob('src/runtime/CL/*.cpp')
     runtime_files += Glob('src/runtime/CL/functions/*.cpp')
     runtime_files += Glob('src/runtime/CL/gemm/*.cpp')
     runtime_files += Glob('src/runtime/CL/tuners/*.cpp')
+    runtime_files += Glob('src/runtime/gpu/cl/*.cpp')
+    runtime_files += Glob('src/runtime/gpu/cl/operators/*.cpp')
 
     graph_files += Glob('src/graph/backends/CL/*.cpp')