Add rustup

[ArchGuyWu]

Package name

rustup

Brief description of package

rustup is an installer for
the systems programming language Rust

URL for package's homepage

https://rustup.rs/

Provide a basic test case to validate the package's functionality.

No response

MINGW environments where you need the package

• MINGW64
• MINGW32
• UCRT64
• CLANG64
• CLANG32
• CLANGARM64

Are you willing to submit a PR?

No response

[ArchGuyWu]

It would be useful for those who need multiple targets.

[Kreijstal]

Yeah this would be nice, I guess you'd have to compile rustup yourself

[500-internal-server-error]

For now I have a PKGBUILD here, mostly taken from Arch with some modifications to better fit in MSYS2 (notably replacing symlinks to multicall binaries with hardlinks, to maintain the small package size without requiring modifications to a stock Win8+ install).