serialize: Add build testcase

Add a basic compile time test that ensures serialize.hpp can build on
its own.

Change-Id: Ib83e9fa73fd44c00884299b48b896f1fe53752c7
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/test/serialize_test.cpp b/test/serialize_test.cpp
new file mode 100644
index 0000000..4ed6446
--- /dev/null
+++ b/test/serialize_test.cpp
@@ -0,0 +1 @@
+#include "../serialize.hpp"