tests.cross.sanity: add pkgs.pkgsCross.musl64.crosvm

[ghost]

Description of changes

Should pass as soon as

• rustc: add a compiler wrapper #267876

is merged.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 23.11 Release Notes (or backporting 23.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

[ghost]

Hrm, I think we might be passing --sysroot twice in some situations. pkgsCross.musl64.crosvm gives me:

error: build of '/nix/store/v35dqc9xc7hv40m5544w9qhwafbnk62c-rustc-x86_64-unknown-linux-musl-1.73.0.drv' on 'ssh://root@192.168.22.106' failed: builder for '/nix/store/v35dqc9xc7hv40m5544w9qhwafbnk62c-rustc-x86_64-unknown-linux-musl-1.73.0.drv' failed with exit code 2
error: builder for '/nix/store/v35dqc9xc7hv40m5544w9qhwafbnk62c-rustc-x86_64-unknown-linux-musl-1.73.0.drv' failed with exit code 1;
       last 10 log lines:
       > Building stage0 library artifacts (x86_64-unknown-linux-gnu)
       > error: failed to run `rustc` to learn about target-specific information
       >
       > Caused by:
       >   process didn't exit successfully: `/build/rustc-1.73.0-src/build/bootstrap/debug/rustc - --crate-name ___ --print=file-names -Ccodegen-units=10 -Csymbol-mangling-version=legacy -Zunstable-options -Zunstable-options '--check-cfg=values(bootstrap)' '--check-cfg=values(stdarch_intel_sde)' '--check-cfg=values(no_fp_fmt_parse)' '--check-cfg=values(no_global_oom_handling)' '--check-cfg=values(no_rc)' '--check-cfg=values(no_sync)' '--check-cfg=values(freebsd12)' '--check-cfg=values(freebsd13)' '--check-cfg=values(backtrace_in_libstd)' '--check-cfg=values(target_vendor,"unikraft")' '--check-cfg=values(target_env,"libnx")' '--check-cfg=values(target_os,"teeos")' '--check-cfg=values(target_arch,"asmjs","spirv","nvptx","xtensa","mips32r6","mips64r6","csky")' -Zmacro-backtrace -Clink-args=-Wl,-z,origin '-Clink-args=-Wl,-rpath,$ORIGIN/../lib' -Csplit-debuginfo=off -Ctarget-feature=-crt-static -Cprefer-dynamic -Zinline-mir '-Zcrate-attr=doc(html_root_url="https://doc.rust-lang.org/1.73.0/")' --target x86_64-unknown-linux-gnu --crate-type bin --crate-type rlib --crate-type dylib --crate-type cdylib --crate-type staticlib --crate-type proc-macro --print=sysroot --print=split-debuginfo --print=crate-name --print=cfg` (exit status: 1)
       >   --- stderr
       >   error: Option 'sysroot' given more than once
       >
       > Build completed unsuccessfully in 0:00:49
       > make: *** [Makefile:12: all] Error 1
       For full logs, run 'nix log /nix/store/v35dqc9xc7hv40m5544w9qhwafbnk62c-rustc-x86_64-unknown-linux-musl-1.73.0.drv'.
error: 1 dependencies of derivation '/nix/store/8wyqp47m4pi46q0r2xx88lffabjj2yl5-rustc-wrapper-1.73.0.drv' failed to build