Use hardlinks in test suite instead of copies
Use hardlinks in test suite instead of copies

This doesn't fix all the copying but some of it

rust-lang/rustup,theindigamer/rustup.rs,inejge/rustup.rs,theindigamer/rustup.rs,Boddlnagg/rustup.rs,inejge/rustup.rs,inejge/rustup.rs,rust-lang/rustup,polonez/rustup.rs,Boddlnagg/rustup.rs,nodakai/rustup.rs,rust-lang/rustup,Boddlnagg/rustup.rs,nodakai/rustup.rs,rust-lang/rustup,theindigamer/rustup.rs,Boddlnagg/rustup.rs,rust-lang/rustup,polonez/rustup.rs,nodakai/rustup.rs,nodakai/rustup.rs,polonez/rustup.rs,theindigamer/rustup.rs,inejge/rustup.rs,inejge/rustup.rs,nodakai/rustup.rs,polonez/rustup.rs,Boddlnagg/rustup.rs,polonez/rustup.rs,theindigamer/rustup.rs