[llvm] [llvm][DebugInfo] Support DW_AT_linkage_names that are different between declaration and definition (PR #154137)

[Michael Buch via llvm-commits]

Michael137 wrote:

Ah looks like this got fixed in:
```
commit b26f424152c1e0fead489239d48d49370bb92680
Author: Michael Liao <michael.hliao at gmail.com>
Date:   Mon Sep 1 21:01:16 2025 -0400

    [llvm][DebugInfo] Fix test on builds without target aarch64
```

https://github.com/llvm/llvm-project/pull/154137