[lld] [LLD][ELF] add bp-* options in ELF (PR #120514)

[Ellis Hoag via llvm-commits]

ellishg wrote:

> @ellishg Yes. I believe it may depend on the binary features. After discussing with @dreampiggy, I've concluded that the relocation aspects likely have minimal impact. Therefore, I prefer to maintain the current implementation to avoid introducing additional complexity in ELF relocations. How do you think?

Seems ok for now. If someone finds that hashing relocations on ELF is useful in the future, they can look at the Mach-O implementation for reference and add it pretty easily

https://github.com/llvm/llvm-project/pull/120514