IVGCVSW-3546 Create a reference dynamic backend to use for testing and as
an example in the docs

 * Wrapped the reference backend into a dynamic backend
 * Moved the static registration code to a separate file, so that
   it is possible to create the reference dynamic backend that does not
   register statically into armnn
 * Added unit test

Change-Id: I1074d21b020820f9ac8c7178388be773b447555a
Signed-off-by: Matteo Martincigh <matteo.martincigh@arm.com>
diff --git a/src/backends/dynamic/reference/RefDynamicBackend.hpp b/src/backends/dynamic/reference/RefDynamicBackend.hpp
new file mode 100644
index 0000000..b058cd2
--- /dev/null
+++ b/src/backends/dynamic/reference/RefDynamicBackend.hpp
@@ -0,0 +1,15 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include <cstdint>
+
+extern "C"
+{
+const char* GetBackendId();
+void GetVersion(uint32_t* outMajor, uint32_t* outMinor);
+void* BackendFactory();
+}