n-api,test: use module name macro

test_constructor_name.c should use NODE_GYP_MODULE_NAME.

PR-URL: https://github.com/nodejs/node/pull/16146
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>

test/addons-napi/test_constructor/test_constructor_name.c

@@ -20,4 +20,4 @@ napi_value Init(napi_env env, napi_value exports) {
   return cons;
 }
 
-NAPI_MODULE(addon, Init)
+NAPI_MODULE(NODE_GYP_MODULE_NAME, Init)