[llvm] [llvm-exegesis] Add did-you-mean hint for unknown opcodes (PR #203463)

[Quanye Yang via llvm-commits]

quanyeyang wrote:

> > And Tested with:
> > 
> > * `llvm-lit llvm/test/tools/llvm-exegesis/X86/analysis-unknown-opcode-did-you-mean.test`
> > * `llvm-lit llvm/test/tools/llvm-exegesis/X86/analysis-skip-unknown-opcode.test`
> 
> I only saw changes on one of these test files. Do you forget to `git add` the other one?

I didn't change `analysis-skip-unknown-opcode.test`, just regression testing.

https://github.com/llvm/llvm-project/pull/203463