ci: Update FreeBSD tarball downloads
ci: Update FreeBSD tarball downloads

These appear to have disappeared from the original server, so I acquired
the contents from a different mirror and uploaded them to our S3 bucket

graydon/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust