fix bug 'ActionView::Template::Error
Created by: t-zuehlsdorff
fix bug 'ActionView::Template::Error (uninitialized constant Gitlab::Markdown::AutolinkFilter::Rinku):'
This bug was found when porting GitLab to FreeBSD. Its not possible to display Readme.md or some service templates - Jira for example - without this patch.
This should update the pull request, but for some reorganisation, become a new one: https://github.com/gitlabhq/gitlabhq/pull/9526