Initial checkin of TOSA reference_model and tests

Change-Id: I2f8e7fa63e2ae40203e57d2cc8814bde3b312cb6
Signed-off-by: Eric Kunze <eric.kunze@arm.com>
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..9a6276e
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "thirdparty/eigen"]
+	path = thirdparty/eigen
+	url = https://gitlab.com/libeigen/eigen.git
+[submodule "thirdparty/flatbuffers"]
+	path = thirdparty/flatbuffers
+	url = https://github.com/google/flatbuffers