Added ParseAdd method to TfLiteParser

Change-Id: I24d916eca8ef1efb70d08b5c4f5123bb56a76c3e
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9651f07..1bd3b97 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -445,6 +445,7 @@
         list(APPEND unittest_sources
              src/armnnTfLiteParser/test/ParserFlatbuffersFixture.hpp
              src/armnnTfLiteParser/test/Activations.cpp
+             src/armnnTfLiteParser/test/Addition.cpp
              src/armnnTfLiteParser/test/AvgPool2D.cpp
              src/armnnTfLiteParser/test/Concatenation.cpp
              src/armnnTfLiteParser/test/Conv2D.cpp