Rename fletch -> dartino

tests/multiprogram_tests/unhandled_signal.dart

Index: tests/multiprogram_tests/unhandled_signal.dart
diff --git a/tests/multiprogram_tests/unhandled_signal.dart b/tests/multiprogram_tests/unhandled_signal.dart
index 418817158843ede45b26ddc0c1671be6bea429b7..9b20d0d6303d31af384c97dce9555b90339c0fd1 100644
--- a/tests/multiprogram_tests/unhandled_signal.dart
+++ b/tests/multiprogram_tests/unhandled_signal.dart
@@ -2,7 +2,7 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE.md file.
 
-import 'dart:fletch';
+import 'dart:dartino';
 
 main() {
   Process.spawn(() => throw "foobar");