Added ConstantLayer support to TfLiteParser

Change-Id: Iecc4fe8208b442d9c872e56c3d47249f959c6cc1
diff --git a/CMakeLists.txt b/CMakeLists.txt
index a12d6b4..e8f9c46 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -453,6 +453,7 @@
              src/armnnTfLiteParser/test/Addition.cpp
              src/armnnTfLiteParser/test/AvgPool2D.cpp
              src/armnnTfLiteParser/test/Concatenation.cpp
+             src/armnnTfLiteParser/test/Constant.cpp
              src/armnnTfLiteParser/test/Conv2D.cpp
              src/armnnTfLiteParser/test/DepthwiseConvolution2D.cpp
              src/armnnTfLiteParser/test/FullyConnected.cpp