[modules] Don't throw when detecting cycle while processing star exports.

test/mjsunit/modules-fail-star-exports-conflict.js

Index: test/mjsunit/modules-fail-star-exports-conflict.js
diff --git a/test/mjsunit/modules-default.js b/test/mjsunit/modules-fail-star-exports-conflict.js
similarity index 55%
copy from test/mjsunit/modules-default.js
copy to test/mjsunit/modules-fail-star-exports-conflict.js
index 304703b246fb1fd935d54e1bf5af435f65465adb..6e2b2193422e770ee4f92f2a8dc0affa3f2d62dc 100644
--- a/test/mjsunit/modules-default.js
+++ b/test/mjsunit/modules-fail-star-exports-conflict.js
@@ -4,8 +4,7 @@
 //
 // MODULE
 
-import foo from "modules-skip-1.js";
-assertEquals(42, foo);
+export * from "modules-skip-star-exports-conflict.js";
+export * from "modules-skip-6.js";
 
-import {default as gaga} from "modules-skip-1.js";
-assertEquals(42, gaga);
+import {a} from "modules-fail-star-exports-conflict.js";