…h, r=jieyouxu

Avoid redundant sysroot additions to `PATH` when linking

Currently, `rustc` prepends `$HOME/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/aarch64-apple-darwin/bin` to the `PATH` three times before invoking the linker, which is unnecessary, once should be enough.

Spotted this while trying to get `-Clinker-flavor=gcc` and `-Clinker-flavor=ld` closer together, not really important.

`@rustbot` A-linkage

…h, r=jieyouxu

Avoid redundant sysroot additions to `PATH` when linking

Currently, `rustc` prepends `$HOME/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/aarch64-apple-darwin/bin` to the `PATH` three times before invoking the linker, which is unnecessary, once should be enough.

Spotted this while trying to get `-Clinker-flavor=gcc` and `-Clinker-flavor=ld` closer together, not really important.

``@rustbot`` A-linkage

…h, r=jieyouxu

Avoid redundant sysroot additions to `PATH` when linking

Currently, `rustc` prepends `$HOME/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/aarch64-apple-darwin/bin` to the `PATH` three times before invoking the linker, which is unnecessary, once should be enough.

Spotted this while trying to get `-Clinker-flavor=gcc` and `-Clinker-flavor=ld` closer together, not really important.

```@rustbot``` A-linkage

…h, r=jieyouxu

Avoid redundant sysroot additions to `PATH` when linking

Currently, `rustc` prepends `$HOME/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/aarch64-apple-darwin/bin` to the `PATH` three times before invoking the linker, which is unnecessary, once should be enough.

Spotted this while trying to get `-Clinker-flavor=gcc` and `-Clinker-flavor=ld` closer together, not really important.

````@rustbot```` A-linkage

…iaskrgr

Rollup of 9 pull requests

Successful merges:

 - rust-lang#130308 (codegen_ssa: consolidate tied target checks)
 - rust-lang#130538 (Stabilize const `{slice,array}::from_mut`)
 - rust-lang#130741 (rustc_target: Add sme-b16b16 as an explicit aarch64 target feature)
 - rust-lang#131033 (Precise capturing in traits)
 - rust-lang#131442 (Match std `RUSTFLAGS` for host and target for `mir-opt` test suite to fix double std build/rebuilds)
 - rust-lang#131470 (add test infra to explicitely test rustc with autodiff/enzyme disabled)
 - rust-lang#131475 (Compiler & its UI tests: Rename remaining occurrences of "object safe" to "dyn compatible" )
 - rust-lang#131493 (Avoid redundant sysroot additions to `PATH` when linking)
 - rust-lang#131509 (Update .mailmap)

r? `@ghost`
`@rustbot` modify labels: rollup

Rollup merge of rust-lang#131493 - madsmtm:avoid-redundant-linker-path, r=jieyouxu

Avoid redundant sysroot additions to `PATH` when linking

Currently, `rustc` prepends `$HOME/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/aarch64-apple-darwin/bin` to the `PATH` three times before invoking the linker, which is unnecessary, once should be enough.

Spotted this while trying to get `-Clinker-flavor=gcc` and `-Clinker-flavor=ld` closer together, not really important.

`````@rustbot````` A-linkage