test rename overhaul: step 8 - language tests

tests/language/src/Prefix4NegativeTest.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.
-//
-
-#library("Prefix4NegativeTest.dart");
-#import("library10.dart");
-
-class Prefix4NegativeTest {
-  static Test1() {
-    // Library prefixes in the imported libraries should not be visible here.
-    var result = 0;
-    var obj = new lib11.Library11(1);
-    result = obj.fld;
-    Expect.equals(1, result);
-    result += obj.func();
-    Expect.equals(3, result);
-  }
-}
-
-main() {
-  Prefix4NegativeTest.Test1();
-}