bug 1592143: add new domains to ALLOW_UPLOAD_BY_DOWNLOAD_DOMAINS
bug 1592143: add new domains to ALLOW_UPLOAD_BY_DOWNLOAD_DOMAINS

Taskcluster is moving to a new infrastructure. This adds two more
domains to the ALLOW_UPLOAD_BY_DOWNLOAD_DOMAINS setting allowing symbols
upload tasks to upload by download from the new infrastructure.

mozilla-services/tecken,mozilla-services/tecken,mozilla-services/tecken,mozilla-services/tecken