Intl test spawning processes must specify the encoding for stdout

pkg/intl/test/message_extraction/message_extraction_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.
 
 library message_extraction_test;
 
 import 'package:unittest/unittest.dart';
 import 'dart:io';
 import 'dart:async';
 import 'package:pathos/path.dart' as path;
@@ skipping 79 matching lines @@
     print("exitCode=${previousResult.exitCode}");
   }
   var filesInTheRightDirectory = filenames.map((x) => dir(x)).toList();
   // Inject the script argument --output-dir in between the script and its
   // arguments.
   var args = []
       ..addAll(vmArgs)
       ..add(filesInTheRightDirectory.first)
       ..addAll(["--output-dir=${dir()}"])
       ..addAll(filesInTheRightDirectory.skip(1));
+  var options = new ProcessOptions()
+      ..stdoutEncoding=Encoding.UTF_8
+      ..stderrEncoding=Encoding.UTF_8;
   var result = Process.run(dart, args);
   return result;
 }
 
 Future<ProcessResult> extractMessages(ProcessResult previousResult) => run(
     previousResult,
     ['extract_to_json.dart', 'sample_with_messages.dart',
         'part_of_sample_with_messages.dart']);
 
 Future<ProcessResult> generateTranslationFiles(ProcessResult previousResult) =>
@@ skipping 100 matching lines @@
   verify("Diese Methode ist nicht eine Lambda");
   verify("Dies ergibt sich aus einer statischen Methode");
   verify("This is missing some translations");
   verify("Antike griechische Galgenmännchen Zeichen: 𐅆𐅇");
 //  verify("Die Sache ist, well");
 //  expect("Einer der knifflige Dinge ist der Plural");
 //  expect("Zu den kniffligen Dinge Pluralformen");
   verify("Escapes: ");
   verify("\r\f\b\t\v.");
 }