rustc: 1.43.0 -> 1.44.1

[alyssais]

I wasn’t able to build thunderbird and Firefox for unrelated reasons (unless it’s gone away on a more recent staging I’ll open a PR for that shortly), but with those issues addressed I’ve successfully built Firefox and Thunderbird with Rust 1.44, so they shouldn’t block the rust update.

Could a Darwin user please nix-build -A fd for me please?

Motivation for this change

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

[LnL7]

Too many other things failed on staging so can't test it properly as is.

[Mic92]

cannot test any cargo-based build on aarch64 because one git test fail on our community aarch64 builder. rustc builds itself.

[FRidh]

Reminder for testing this PR.

[Ma27]

Tested this while investigating #89481, LGTM 👍

[Mic92]

I will give aarch64 another try.

[Mic92]

aarch64 builds now fd properly.

[L-as]

This should be updated to 1.44.1 IMO. Apparently 1.44.0 had several regressions: https://github.com/rust-lang/rust/blob/stable/RELEASES.md#version-1441-2020-06-18

[alyssais]

This should be updated to 1.44.1 IMO. Apparently 1.44.0 had several regressions: https://github.com/rust-lang/rust/blob/stable/RELEASES.md#version-1441-2020-06-18

Done. Thunderbird and Firefox are now broken due to #85189, but I think it's reasonable to assume that if they built with 1.44.0 they'll build with 1.44.1.