IVGCVSW-7104: BatchMatMul Serializer/Deserializer Support

  * Updated FlatBuffers schema for BatchMatMul layer type
  * Added Serializer and Deserializer implementations for BatchMatMul
  * Added unit tests for BatchMatMul serialization and deserialization
  * Updated CMakeLists and docs

Signed-off-by: Samuel Yap <samuel.yap@arm.com>
Change-Id: Iad63afbd036a3eb648683eb7416a475561aa20cb
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c63d8fc..4e4818d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -775,6 +775,7 @@
             src/armnnDeserializer/test/DeserializeActivation.cpp
             src/armnnDeserializer/test/DeserializeAdd.cpp
             src/armnnDeserializer/test/DeserializeArgMinMax.cpp
+            src/armnnDeserializer/test/DeserializeBatchMatMul.cpp
             src/armnnDeserializer/test/DeserializeBatchToSpaceNd.cpp
             src/armnnDeserializer/test/DeserializeBatchNormalization.cpp
             src/armnnDeserializer/test/DeserializeCast.cpp