Compiling tests for `wasm64-unknown-unknown` on latest Nightly results in linking error

[newpavlov]

Compiling any crate with cargo test --no-run -Z build-std=std,panic_abort --target=wasm64-unknown-unknown results in the following error: rust-lld: error: /home/dir/.cargo/target/wasm64-unknown-unknown/debug/deps/libtest-ed35d2d81ad088d3.rlib(lib.rmeta): wasm32 object file can't be linked in wasm64 mode. This is a regression introduced in one of the recent NIghtly versions.

Toolchain version: cargo 1.78.0-nightly (194a60b29 2024-02-21)

[matthiaskrgr]

Probably related to #120588 cc @alexcrichton

[alexcrichton]

Yep definitely looks like my fault, I'll work on a fix!