Implements far branch targets for MIPS.

tests/lib/typed_data/float32x4_shuffle_test.dart

Index: tests/lib/typed_data/float32x4_shuffle_test.dart
===================================================================
--- tests/lib/typed_data/float32x4_shuffle_test.dart	(revision 25539)
+++ tests/lib/typed_data/float32x4_shuffle_test.dart	(working copy)
@@ -1,6 +1,7 @@
 // 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=--optimization-counter-threshold=10 --use-far-branches
 
 // Library tag to be able to run in html test framework.
 library float32x4_shuffle_test;
@@ -1310,7 +1311,7 @@
 
 
 main() {
-  for (int i = 0; i < 4000; i++) {
+  for (int i = 0; i < 20; i++) {
     testShuffle0();
     testShuffle1();
     testShuffle2();