[debugger] fix mjsunit/debug-allscopes-on-debugger.js for ignition.

test/mjsunit/debug-allscopes-on-debugger.js

Index: test/mjsunit/debug-allscopes-on-debugger.js
diff --git a/test/mjsunit/debug-allscopes-on-debugger.js b/test/mjsunit/debug-allscopes-on-debugger.js
index b7a8dff1ba2d8ce13df88ddde9aa424b64551b47..17668cfc2449a14ab375ff7bfe07f41937a0c872 100644
--- a/test/mjsunit/debug-allscopes-on-debugger.js
+++ b/test/mjsunit/debug-allscopes-on-debugger.js
@@ -49,10 +49,11 @@ var sum = 0;
   var i = 0; // Break 1.
   i++; // Break 2.
   i++; // Break 3.
-  return i; // Break 4.
-}()); // Break 5.
+  debugger;  // Break 4.
+  return i; // Break 5.
+}()); // Break 6.
 
-assertNull(exception); // Break 6.
+assertNull(exception); // Break 7.
 assertEquals(expected_breaks, break_count);
 
 Debug.setListener(null);