test rename overhaul: step 8 - language tests

tests/language/src/OverrideFieldTest.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.
-// Dart test checking that static/instance field shadowing do not conflict.
-
-class A {
-  A() {}  // DartC has no implicit constructors yet.
-
-  int instanceFieldInA;
-  static int staticFieldInA;
-}
-
-class B extends A {
-  B() : super() {}  // DartC has no implicit constructors yet.
-
-  static int instanceFieldInA; /// 01: compile-time error
-  int staticFieldInA; /// 02: static type warning
-  static int staticFieldInA; /// 03: static type warning
-  int instanceFieldInA; /// 04: compile-time error
-}
-
-main() {
-  var x  = new B();
-}