Revert ebb326a and dcc45fa

[dianqk]

Fixes rust-lang/rust#131164.

This PR reverts llvm@ebb326a and llvm@dcc45fa.

The next stable (1.83.0) version of Rust will be October 17, 2024, and our beta backport decision is October 10, 2024. The next LLVM backport is likely to happen after this date. I think reverting this commit would be a better approach. At the same time, I've seen multiple regressions on llvm#87530.

I encountered some conflicts at lld/ELF/Driver.cpp and lld/ELF/LinkerScript.h. Please review carefully. :>

I have already run ninja -C build check-lld locally.

[dianqk]

@cuviper Do you have time to review this PR? I'd like to nominate backport.

[nikic]

A very tentative LGTM. The issue being fixed does not look important to me, and I'm not familiar enough with LLD to evaluate the risk of this change, especially so late in the release cycle. I can only hope that a revert is relatively safe...

[dianqk]

Blessing. Considering that this is unrelated to the target, it may still have some potential impact, though I am not sure how many applications are using the linker script. Anyway, I think we can still decide during the final backport.