graphics/mozjpeg: Update to 4.1.5
- Update manpage location (003a571d1d6585196545295efc181514f171c4c4, r523104)
Changes: https://github.com/mozilla/mozjpeg/releases
https://github.com/mozilla/mozjpeg/blob/master/ChangeLog.md https://github.com/mozilla/mozjpeg/commits/master