[lld] [llvm] [MC] set OpenBSD's ELFOSABI by default (#98158) (PR #98553)

[John Ericson via llvm-commits]

Ericson2314 wrote:

That issue is non spurious, but fixed immediately after in https://github.com/llvm/llvm-project/pull/98555

https://github.com/llvm/llvm-project/pull/98553