[llvm] [ELFAttributeParser][NFC] Make string array arguments `const` (PR #101460)

[Victor Campos via llvm-commits]

vhscampos wrote:

I meant the arrays, yes. Sorry for the confusion. I said "pointers" with the meaning of pointer-to-pointers.

I suggest the commit title says just "Make string arrays const".

https://github.com/llvm/llvm-project/pull/101460