Architectures to build makedeb + dependencies for

[hwittenborn]

We're going to start introducing Rust dependencies into the project (specifically sentry-cli, a Rust-based APT dependency resolver, and a Rust-based TOML parser), and makedeb will thus become architecture-dependent as a result. The Sentry CLI isn't packaged for Debian, so we'll need to provide those packages in the makedeb APT repository as well.

We thus need to determine what architectures we'd like to officially provide packages for. Currently that is as follows:

• amd64 (Most common of all time ftw)
• arm64 (Used by Authelia)
• armhf (Used by Authelia)
• i386 (Used by PolyMC)