[modules] Do basic linking.

test/mjsunit/modules-SKIP-2.js

Index: test/mjsunit/modules-SKIP-2.js
diff --git a/test/message/generators-throw1.js b/test/mjsunit/modules-SKIP-2.js
similarity index 76%
copy from test/message/generators-throw1.js
copy to test/mjsunit/modules-SKIP-2.js
index b4d404a1bf4d1e8f46c669c79f9ececd6f1ee64f..d0b14149d0f5beda5f345e8a14c0c6b86ce953ef 100644
--- a/test/message/generators-throw1.js
+++ b/test/mjsunit/modules-SKIP-2.js
@@ -2,6 +2,4 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-function* f() { yield }
-
-f().throw(42);
+export {a as b, default} from "modules-SKIP-1.js";