fix some tests

tests/language/src/ConstructorRedirect3NegativeTest.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 // Redirection constructors must not initialize any fields.
 
 class A {
   var x;
   A(this.x) {}
   A.named() : this(3), x = 5 {}
 }
 
 class ConstructorRedirect3NegativeTest {
   static testMain() {
+    new A.named();
   }
 }
 
 main() {
   ConstructorRedirect3NegativeTest.testMain();
 }