test rename overhaul: step 8 - language tests

tests/language/src/GettersSettersType3Test.dart

-// Copyright (c) 2012, 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.
-// Getters and setters can have different types, and it is not a warning if the
-// two types are assignable.
-// @static-clean
-
-int bar = 499;
-
-get foo() => bar;
-
-void set foo(String str) { bar = str.length; }
-
-main() {
-  int x = foo;
-  Expect.equals(499, x);
-  foo = "1234";
-  int y = foo;
-  Expect.equals(4, y);
-}