[llvm] [RISCV] Emit <ISA> together with mapping symbols for functions (PR #77292)

[Andreu Carminati via llvm-commits]

andcarminati wrote:

Hi @topperc, @jrtc27, @MaskRay.

This is a draft for the emission of the ISA part with mapping symbols. This is related to https://github.com/llvm/llvm-project/issues/76231 (this first part is necessary to fix this issue - the second part is related to llvm-objdump itself) . If you could take a look and give suggestions, I would appreciate it.

Thank you very much.

https://github.com/llvm/llvm-project/pull/77292