IVGCVSW-2060: Separate and move backend specific unit tests from the src/armnn/test folder to the backends

* Moved backend-specific memory leak checking tests from RuntimeTests.cpp to
  the corresponding backend test folder

Change-Id: I0a7f4ef52c5350c3cebca23b2b4e61a9446ca11f
diff --git a/src/backends/neon/test/CMakeLists.txt b/src/backends/neon/test/CMakeLists.txt
index 384a5e1..e6a2859 100644
--- a/src/backends/neon/test/CMakeLists.txt
+++ b/src/backends/neon/test/CMakeLists.txt
@@ -8,6 +8,7 @@
     NeonLayerSupportTests.cpp
     NeonLayerTests.cpp
     NeonMemCopyTests.cpp
+    NeonRuntimeTests.cpp
     NeonTimerTest.cpp
 )