Update unittest to new package layout.

tests/html/typed_arrays_5_test.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.
 
 #library('typed_arrays_5_test');
-#import('../../pkg/unittest/unittest.dart');
-#import('../../pkg/unittest/html_config.dart');
+#import('../../pkg/unittest/lib/unittest.dart');
+#import('../../pkg/unittest/lib/html_config.dart');
 #import('dart:html');
 
 main() {
   useHtmlConfiguration();
 
   test('filter_dynamic', () {
       var a = new Float32Array(1024);
       for (int i = 0; i < a.length; i++) {
         a[i] = i;
       }
 
       expect(a.filter((x) => x >= 1000).length, equals(24));
   });
 
   test('filter_typed', () {
       Float32Array a = new Float32Array(1024);
       for (int i = 0; i < a.length; i++) {
         a[i] = i;
       }
 
       expect(a.filter((x) => x >= 1000).length, equals(24));
   });
 }