IVGCVSW-5384 TfLiteDelegate: Implement the Gather operator

Signed-off-by: Teresa Charlin <teresa.charlinreyes@arm.com>
Change-Id: Iaf2112363d2b191327711d8e083fee2a751c35c5
diff --git a/delegate/CMakeLists.txt b/delegate/CMakeLists.txt
index 38f7bd1..c04472e 100644
--- a/delegate/CMakeLists.txt
+++ b/delegate/CMakeLists.txt
@@ -120,6 +120,8 @@
         src/test/ElementwiseUnaryTestHelper.hpp
         src/test/FullyConnectedTest.cpp
         src/test/FullyConnectedTestHelper.hpp
+        src/test/GatherTest.cpp
+        src/test/GatherTestHelper.hpp
         src/test/Pooling2dTest.cpp
         src/test/Pooling2dTestHelper.hpp
         src/test/QuantizationTest.cpp