[llvm] [BPF] Support Jump Table (PR #149715)

[Anton Protopopov via llvm-commits]

aspsk wrote:

> But the question remains, @aspsk , do we need relocations in the `.jumptables` section for libbpf linker?

So far, I don't see that we do need them @eddyz87 

https://github.com/llvm/llvm-project/pull/149715