[modules] Support star exports.

test/mjsunit/modules-imports6.js

Index: test/mjsunit/modules-imports6.js
diff --git a/test/mjsunit/modules-imports4.js b/test/mjsunit/modules-imports6.js
similarity index 70%
copy from test/mjsunit/modules-imports4.js
copy to test/mjsunit/modules-imports6.js
index 4d734878aa08bcb07c924b06d933a3889cbadc97..4cb117a98d99536e01b30f175c59c89a38c32376 100644
--- a/test/mjsunit/modules-imports4.js
+++ b/test/mjsunit/modules-imports6.js
@@ -4,11 +4,8 @@
 //
 // MODULE
 
-import {b, c} from "modules-skip-2.js";
-import {a, set_a} from "modules-skip-1.js";
-import x from "modules-skip-2.js";
-
-assertEquals(42, x);
+import {b, c} from "modules-skip-4.js";
+import {a, set_a} from "modules-skip-4.js";
 
 assertEquals(1, a);
 assertEquals(1, b);
@@ -26,6 +23,3 @@ assertThrows(() => c = 3, TypeError);
 assertEquals(2, a);
 assertEquals(2, b);
 assertEquals(2, c);
-
-assertThrows(() => x = 43, TypeError);
-assertEquals(42, x);