IVGCVSW-3033 Adding MockLayerSupport to MockBackend

Signed-off-by: David Monahan <david.monahan@arm.com>
Change-Id: I90903af1b8c961a7727da9172a7f02031521a6ad
diff --git a/src/backends/backendsCommon/test/MockBackend.cpp b/src/backends/backendsCommon/test/MockBackend.cpp
index 4eb96b5..043b512 100644
--- a/src/backends/backendsCommon/test/MockBackend.cpp
+++ b/src/backends/backendsCommon/test/MockBackend.cpp
@@ -109,7 +109,8 @@
 
 IBackendInternal::ILayerSupportSharedPtr MockBackend::GetLayerSupport() const
 {
-    return ILayerSupportSharedPtr{};
+    static ILayerSupportSharedPtr layerSupport{new MockLayerSupport};
+    return layerSupport;
 }
 
 OptimizationViews MockBackend::OptimizeSubgraphView(const SubgraphView& subgraph) const