[llvm] [ObjectYAML][ELF] Allow verdaux entry offset to be user-defined (PR #115343)

[Antonio Frighetto via llvm-commits]

antoniofrighetto wrote:

I'm don't think adding support in yaml2elf should be desirable too. To achieve that we would need to add VDAux too in `struct VerDef` in Object/ELF.h, and this looks quite of an invasive change, since it would be used here:

https://github.com/llvm/llvm-project/blob/076aac59acbe7555b922e77886e4428f1aa1cd0b/llvm/tools/llvm-readobj/ELFDumper.cpp#L7619-L7622

In general, as the original report mentions, this is a crash-on-invalid, I don't think the user should be able to modify the vd_aux themselves (unless manually modifying the binary), but it's fine to have it elsewhere for testing purpose for https://github.com/llvm/llvm-project/pull/115284.

https://github.com/llvm/llvm-project/pull/115343