Missing snapshots for Bitrig, FreeBSD 32-bit and FreeBSD 64-bit

[dhuseby]

This issue is for adding the snapshots.

[dhuseby]

Snapshots inbound. See PR #27821

[gkoz]

Could you please look into taking care of NetBSD as well?

[dhuseby]

@gkoz I've got a NetBSD builder set up on my VM host already but I've been unable to build it from source just yet. I've been using my cross-bootstrap scripts to get a rustc that runs on NetBSD. Just a couple issues left I think, but I'm busy with lots of things right now. It might be a little while, but I'm hoping to have it online ASAP.

[gkoz]

@dhuseby great, thanks for the update!