Repocopy for PHP 7

Summary:
We copy the rDPHPFPM repository in rDPHPVIIFPM to manage
one repository by major language version.

This repo will be the authoritative base for the following Docker
image: nasqueron/nginx-php7-fpm

Ref T625

Test Plan: arc which

Reviewers: dereckson

Reviewed By: dereckson

Maniphest Tasks: T625

Differential Revision: https://devcentral.nasqueron.org/D756