PHP 5.3.23 and PHP 5.4.13 should use Zend\Stdlib\ArrayObject\PhpLegacyCompatibility

With PHP 5.3.23 and PHP 5.4.13 being released (http://www.php.net/ChangeLog-5.php) it contains a fix for being able to unset multi-dimensional arrays (JOY!) in an ArrayObject so it does not freak out with wonderful error messages.  More on the bug: https://bugs.php.net/bug.php?id=52861

Anyhow, since this is now resolved the polyfill needs to be updated so we don't randomly leave people with references.  This also resolves #3961 where you would receive a reference if your version was greater than 5.3.3 (your PHP version must be 5.3.23 OR 5.4.13 to not receive a reference).