test rename overhaul: step 8 - language tests

tests/language/constructor_setter_negative_test.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.
 // Test that setters are not invokable in the initializer list.
 
 class A {
   A() : a = 499;  // <==== Error here.
 
   set a(val){}
 }
 
 main() {
   new A();
 }