Rename dart:typeddata to dart:typed_data.

tests/lib/typed_data/float32x4_unbox_regress_test.dart

 // Copyright (c) 2013, 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.
 // VMOptions=--deoptimization_counter_threshold=1000
 
 // Library tag to be able to run in html test framework.
 library float32x4_unbox_regress_test;
 
 import 'package:expect/expect.dart';
-import 'dart:typeddata';
+import 'dart:typed_data';
 
 testListStore(array, index, value) {
   array[index] = value;
 }
 
 void testListStoreDeopt() {
   var list;
   var value = new Float32x4(1.0, 2.0, 3.0, 4.0);
   var smi = 12;
   list = new Float32x4List(8);
@@ skipping 26 matching lines @@
 
   try {
     testAdd(a, smi);
   } catch (_) {}
 }
 
 main() {
   testListStoreDeopt();
   testAddDeopt();
 }