Bump PHPUnit version for FreeBSD

Summary:
PHPUnit package names now include the PHP version.

Fixes T1553.

Test Plan: salt windriver state.sls_id devserver_software_dev_php roles/devserver/userland-software

Reviewers: dereckson

Reviewed By: dereckson

Maniphest Tasks: T1553

Differential Revision: https://devcentral.nasqueron.org/D2128