Move tests out of corelib into scalarlist

tests/lib/scalarlist/float32x4_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 tag to be able to run in html test framework.
 library float32x4_test;
 
 import 'dart:scalarlist';
 
 testAdd() {
@@ skipping 355 matching lines @@
     testScale();
     testClamp();
     testAbs();
     testMin();
     testMax();
     testSqrt();
     testReciprocal();
     testReciprocalSqrt();
   }
 }