IVGCVSW-6677 Register CopyAndImportFactoryPairs to ClBackend and unit tests

Signed-off-by: Narumol Prangnawarat <narumol.prangnawarat@arm.com>
Change-Id: Ib0bf99c81ae1b30079be194a82b207761cb56028
diff --git a/src/backends/cl/test/CMakeLists.txt b/src/backends/cl/test/CMakeLists.txt
index af116a4..9840b82 100644
--- a/src/backends/cl/test/CMakeLists.txt
+++ b/src/backends/cl/test/CMakeLists.txt
@@ -4,6 +4,7 @@
 #
 
 list(APPEND armnnClBackendUnitTests_sources
+    ClBackendTests.cpp
     ClContextControlFixture.hpp
     ClContextSerializerTests.cpp
     ClCustomAllocatorTests.cpp