Low-level PHP binding for libvips

This extension lets you use the libvips image processing library
from PHP 7. It is intentionally very low-level: modules such as
https://github.com/libvips/php-vips try to layer a nice API on
top of this.

WWW: https://github.com/libvips/php-vips-ext

PR: 238609
Submitted by: punkt.de Hosting Team <mops@punkt.de>
Event: Berlin hackathon 2019