test rename overhaul: step 8 - language tests

tests/language/src/Prefix5NegativeTest.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("Prefix5NegativeTest.dart");
-#import("library10.dart");
-
-class Prefix5NegativeTest {
-  static Test1() {
-    // Library prefixes in the imported libraries should not be visible here.
-    var result = 0;
-    result += lib11.Library11.static_func();
-    Expect.equals(6, result);
-    result += lib11.Library11.static_fld;
-    Expect.equals(10, result);
-  }
-}
-
-main() {
-  Prefix5NegativeTest.Test1();
-}