[clang-tidy] add ending namespace comments

Found with llvm-namespace-comment

Signed-off-by: Rosen Penev <rosenp@gmail.com>

src/lib/dbus/Glue.cxx

@@ -56,4 +56,4 @@ Glue::OnDBusClosed() noexcept
 	// TODO: reconnect
 }
 
-}
+} // namespace ODBus

src/lib/upnp/ixmlwrap.cxx

@@ -38,4 +38,4 @@ getFirstElementValue(IXML_Document *doc, const char *name) noexcept
 	return ixmlNode_getNodeValue(dnode);
 }
 
-}
+} // namespace ixmlwrap