IVGCVSW-2643 Add Serializer & Deserializer for Activation

 * Added ActivationLayer to Schema.fbs
 * Added Activation serialization and deserialization support
 * Added serialization and deserialization unit tests

Change-Id: Ib5df45f123674988b994ffe3f111d3fb57864912
Signed-off-by: Mike Kelly <mike.kelly@arm.com>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3ae971b..30e17cf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -553,7 +553,9 @@
         enable_language(ASM)
         list(APPEND unittest_sources
                 src/armnnSerializer/Schema_generated.h
+                src/armnnSerializer/test/ActivationSerializationTests.cpp
                 src/armnnSerializer/test/SerializerTests.cpp
+                src/armnnDeserializer/test/DeserializeActivation.cpp
                 src/armnnDeserializer/test/DeserializeAdd.cpp
                 src/armnnDeserializer/test/DeserializeConvolution2d.cpp
                 src/armnnDeserializer/test/DeserializeMultiplication.cpp