[modules] Do basic linking.

test/mjsunit/modules-skip-2.js

Index: test/mjsunit/modules-skip-2.js
diff --git a/test/message/for-of-throw-in-body.js b/test/mjsunit/modules-skip-2.js
similarity index 59%
copy from test/message/for-of-throw-in-body.js
copy to test/mjsunit/modules-skip-2.js
index 38b27f38632520e292f66b7ab451df00c2c03b68..fdd576a988d067e5aca39ade21f0ec0da3ab5236 100644
--- a/test/message/for-of-throw-in-body.js
+++ b/test/mjsunit/modules-skip-2.js
@@ -2,4 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-for (var x of [1, 2, 3]) { throw 42 }
+export {a as b, default} from "modules-skip-1.js";
+import {a as tmp} from "modules-skip-1.js";
+export {tmp as c};