MFH: r431941

Update PHP 7 from 7.0.14 to 7.0.15

Changelog: http://www.php.net/ChangeLog-7.php#7.0.15

PR: 216210
Submitted by: Jochen Neumeister <joneum@bsdproject.de>
Security: https://vuxml.freebsd.org/freebsd/709e025a-de8b-11e6-a9a5-b499baebfeaf.html

Approved by: ports-secteam (junovitch)