After trying once to create a Realm in regress-crbug-501711.js give up

R=hpayer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1261123003

Cr-Commit-Position: refs/heads/master@{#29946}

test/mjsunit/regress/regress-crbug-501711.js

@@ -8,7 +8,11 @@ function f() {
   try {
     f();
   } catch(e) {
+    try {
       Realm.create();
+    } catch (e) {
+      quit();
+    }
   }
 }
 f();