test rename overhaul: step 8 - language tests

tests/language/src/Prefix17Test.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("Prefix17Test.dart");
-#import("library12.dart", prefix:"lib12");
-
-class LocalClass {
-  static int static_fld;
-}
-
-void main() {
-  LocalClass.static_fld = 42;
-  var lc1 = new lib12.Library12(5);
-  lib12.Library12 lc2 = new lib12.Library12(10);
-  lib12.Library12 lc2m = new lib12.Library12.other(10,2);
-  lib12.Library12.static_fld = 43;
-  //print("${LocalClass.static_fld}, ${lc1.fld}, ${lc2.fld}, ${lc2m.fld}, ${lib12.Library12.static_fld}");
-}