Update unittest to new package layout.

tests/html/typed_arrays_3_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('TypedArrays3Test');
-#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('setElementsTest_dynamic', () {
       var a1 = new Int8Array(1024);
 
       a1.setElements([0x50,0x60,0x70], 4);
 
@@ skipping 13 matching lines @@
 
       Uint32Array a2 = new Uint32Array.fromBuffer(a1.buffer);
       Expect.equals(0x00000000, a2[0]);
       Expect.equals(0x00706050, a2[1]);
 
       a2.setElements([0x01020304], 2);
       Expect.equals(0x04, a1[8]);
       Expect.equals(0x01, a1[11]);
   });
 }