Auto merge of rust-lang#99676 - thomcc:dont-overwrite, r=tmiasko

Don't overwrite CodegenFnAttrs when adding used compiler/linker

Pointed out by `@tmiasko` in rust-lang#93718 (comment). Probably a better fix than rust-lang#99674 for rust-lang#99596, assuming it does fix the latter.

I don't have the ability to write a regression test for this at the moment, and am quite surprised this didn't cause other failures. The old code is clearly wrong though, but I'm not picky as to which of these is better to go with.

Author: bors

Diff for: compiler/rustc_typeck/src/collect.rs

@@ -2843,7 +2843,7 @@ fn codegen_fn_attrs(tcx: TyCtxt<'_>, did: DefId) -> CodegenFnAttrs {
                     let is_like_elf = !(tcx.sess.target.is_like_osx
                         || tcx.sess.target.is_like_windows
                         || tcx.sess.target.is_like_wasm);
-                    codegen_fn_attrs.flags = if is_like_elf {
+                    codegen_fn_attrs.flags |= if is_like_elf {
                         CodegenFnAttrFlags::USED
                     } else {
                         CodegenFnAttrFlags::USED_LINKER