[arm] Fix sNaN quietening in the ARM simulator on IA-32.

test/mjsunit/regress/regress-undefined-nan2.js

Index: test/mjsunit/regress/regress-undefined-nan2.js
diff --git a/test/mjsunit/regress/regress-449070.js b/test/mjsunit/regress/regress-undefined-nan2.js
similarity index 56%
copy from test/mjsunit/regress/regress-449070.js
copy to test/mjsunit/regress/regress-undefined-nan2.js
index 7a0f0a838cdd25817ab6a2d8f63c1ef9fbe6e526..9b0a05f8fddfe885d471a112bfa72f0832960ee0 100644
--- a/test/mjsunit/regress/regress-449070.js
+++ b/test/mjsunit/regress/regress-undefined-nan2.js
@@ -1,10 +1,12 @@
 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-//
-// Flags: --allow-natives-syntax
 
-try {
-  %NormalizeElements(this);
-} catch(e) {
+function foo(a, i) {
+  var o = [0.5,,1];
+  a[i] = o[i];
 }
+var a1 = [0.1,0.1];
+foo(a1, 0);
+foo(a1, 1);
+assertEquals(undefined, a1[1]);