Rollup merge of #131480 - madsmtm:macos-fix-strip-binary, r=nnethercote

Fix hardcoded strip path when cross-compiling from Linux to Darwin
Fixes#131206.
I fear that #131405 might end up taking some time, so opening this PR to resolve the regression.
`@rustbot` label O-apple

Author: matthiaskrgr

compiler/rustc_codegen_ssa/src/back/link.rs

@@ -1087,7 +1087,9 @@ fn link_natively(
 let strip = sess.opts.cg.strip;
 
 if sess.target.is_like_osx{
-let stripcmd = "/usr/bin/strip";
+// Use system `strip` when running on host macOS.
+// <https://github.com/rust-lang/rust/pull/130781>
+let stripcmd = ifcfg!(target_os = "macos"){"/usr/bin/strip"}else{"strip"};
 match(strip, crate_type){
 (Strip::Debuginfo, _) => {
 strip_symbols_with_external_utility(sess, stripcmd, out_filename,Some("-S"))