Build type information on first use (load-time), instead of using a hardcoded list

--HG--
branch : dynamiccore2

src/modules/system/wrap_System.cpp

@@ -118,7 +118,7 @@ extern "C" int luaopen_love_system(lua_State *L)
 	WrappedModule w;
 	w.module = instance;
 	w.name = "system";
-	w.type = MODULE_ID;
+	w.type = &Module::type;
 	w.functions = functions;
 	w.types = nullptr;