Refactor JSON printer test implementation

Change-Id: Icc1de9b69d7bb74b6bf5a6a6f315cf07fe2c5223
diff --git a/src/backends/backendsCommon/test/CMakeLists.txt b/src/backends/backendsCommon/test/CMakeLists.txt
index 962c6a5..485241f 100644
--- a/src/backends/backendsCommon/test/CMakeLists.txt
+++ b/src/backends/backendsCommon/test/CMakeLists.txt
@@ -16,6 +16,7 @@
     EndToEndTestImpl.hpp
     FullyConnectedTestImpl.hpp
     IsLayerSupportedTestImpl.hpp
+    JsonPrinterTestImpl.cpp
     JsonPrinterTestImpl.hpp
     LayerReleaseConstantDataTest.cpp
     LayerTests.cpp