Fix dartium build by fixing SIMD tests.

runtime/tests/vm/dart/simd128float32_test.dart

Index: runtime/tests/vm/dart/simd128float32_test.dart
diff --git a/runtime/tests/vm/dart/simd128float32_test.dart b/runtime/tests/vm/dart/simd128float32_test.dart
index 4132bbff6727e8ff290f3175a51f808d46fa906e..cac2b63f0f94886012c161692a1e4baab94a0e62 100644
--- a/runtime/tests/vm/dart/simd128float32_test.dart
+++ b/runtime/tests/vm/dart/simd128float32_test.dart
@@ -2,6 +2,9 @@
 // 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 tag to be able to run in html test framework.
+library simd128_float32_test;
+
 import 'dart:scalarlist';
 
 testAdd() {
@@ -369,4 +372,4 @@ main() {
     testReciprocal();
     testReciprocalSqrt();
   }
-}
+}