message: Add class for object-path and signatures

Change-Id: I1ca54ecc5d4033c41738bd224399f80b95094430
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/Makefile.am b/Makefile.am
index 1870f06..78ab597 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -7,6 +7,7 @@
 	sdbusplus/exception.hpp \
 	sdbusplus/message.hpp \
 	sdbusplus/message/append.hpp \
+	sdbusplus/message/native_types.hpp \
 	sdbusplus/message/read.hpp \
 	sdbusplus/message/types.hpp \
 	sdbusplus/server.hpp \