Update gitlab_vs_jenkins.yml with information about missing build reports.

Open username-removed-116443 requested to merge elygre/www-gitlab-com:patch-223 into master

It would be great if GitLab let you view build reports in the browser, but it currently does not. Until it does, the comparison should reflect the actual situation.

(https://gitlab.com/gitlab-org/gitlab-ce/issues/13227, https://gitlab.com/gitlab-org/gitlab-ce/issues/18664, https://gitlab.com/gitlab-org/gitlab-ce/issues/17081, https://gitlab.com/gitlab-org/gitlab-ce/issues/10982, https://gitlab.com/gitlab-org/gitlab-ce/issues/23618, etc)