Backporting accepted pull request

Hi, I've recently created a pull request for an change in the ldap extension, and it was accepted. It was added to the release of PHP 7.0.5, but because it is such a tiny change that doesn't break anything, I was wondering if it is possible to backport the commit to older PHP versions, like 5.5 or 5.6. I have no idea how this would work and couldn't really find anything documented on this matter. The pull request in question: https://github.com/php/php-src/pull/1765 Thanks! - Edwin