Bundle freetype 2.4.11 to fix GD conflict

Bundle freetype 2.4.11 in with puppet-php similarly to zlib. This is to fix the conflict with GD, as mentioned in boxen/puppet-php#25. I've included version 2.4.11, as that was the version linked in #25, though version 2.5.0.1 was also mentioned as a potential candidate for bundling in [mattheath/puppet-php#46](https://github.com/mattheath/puppet-php/issues/46#issuecomment-29804693).