Support more targets

[taiki-e]

rust-cross-toolchain, on which this project is based, supports so many targets.

[zeeshanlakhani]

Hey @taiki-e,

I was going to add a PR to cargo-hack for it to build a release for illumos (x86_64-unknown-illumos). I see that rust-cross-toolchain already supports this, so it should be straightforward to update this action and easily run it for cargo-hack, right? I just wanted to ensure I wasn't missing something before doing the work.

Other options:

• We can use cross directly in another job or via a conditional, but I'm guessing you'd prefer the toolchain set up already?

[taiki-e]

I see that rust-cross-toolchain already supports this, so it should be straightforward to update this action and easily run it for cargo-hack, right?

Yeah, I guess it would generally be the same as the NetBSD case, except that it does not support multiple OS versions.

Probably could be implemented by simply adding an | *-illumos* to the two lines in main.sh, and updating the CI and readme.

setup-cross-toolchain-action/main.sh

Line 501 in 5512f65

*-netbsd*)

setup-cross-toolchain-action/main.sh

Line 657 in 5512f65

*-freebsd* | *-netbsd*)

setup-cross-toolchain-action/.github/workflows/ci.yml

Lines 152 to 155 in 5512f65

	# NetBSD
	# rustup target list | grep -e '-netbsd'
	# rustc --print target-list | grep -e '-netbsd'
	- target: aarch64-unknown-netbsd # tier3