Fix test expectations.

test/mjsunit/es6/debug-promises/reject-caught-by-default-reject-handler.js

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --expose-debug-as debug --allow-natives-syntax
 
 // Test debug events when we only listen to uncaught exceptions and
 // there is a catch handler for the to-be-rejected Promise.
 // We expect an Exception debug event with a promise to be triggered.
 
@@ skipping 64 matching lines @@
     }
   }
 
   // Run testDone through the Object.observe processing loop.
   var dummy = {};
   Object.observe(dummy, checkResult);
   dummy.dummy = dummy;
 }
 
 testDone(0);