Initial commit of serialization library code

Change-Id: Ie09a7245176aa799e59622e5118b145833b23590
Signed-off-by: Eric Kunze <eric.kunze@arm.com>
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..fa78bd5
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "third_party/flatbuffers"]
+	path = third_party/flatbuffers
+	url = https://github.com/google/flatbuffers.git