Favicon for MR's no longer include the current CI badge status

Summary

The favicon for MR's is no longer being updated to reflect the current CI badge status. Success, failure and WIP states are all not showing.

Steps to reproduce

Look through https://gitlab.com/gitlab-org/gitlab-ce/merge_requests for examples of success, failure and WIP MR's and click each one.

Example Project

N/A

What is the current bug behavior?

The favicon for MR's does not include the current CI badge status where as it previously used to (up until at least a few days ago).

What is the expected correct behavior?

For MR's, the favicon should include a CI badge that indicates the status of the MR, either WIP, failure or success.

Relevant logs and/or screenshots

See Steps to reproduce