[llvm] [RFC][BPF] Support Jump Table (PR #133856)

[Yingchi Long via llvm-commits]

https://github.com/inclyc commented:

Do we need to modify the ASMParser also?

https://github.com/llvm/llvm-project/blob/f2e62cfca5e5719f2d79e4a7ab88fdc239b60bd3/llvm/lib/Target/BPF/AsmParser/BPFAsmParser.cpp#L228-L233

https://github.com/llvm/llvm-project/pull/133856