[llvm] [llvm-cxxfilt] Add --quote option to quote demangled function names (PR #111871)

[James Henderson via llvm-commits]

https://github.com/jh7370 commented:

Looks good, barring the remaining nits. I'll give it one more once-over once you've addressed those to make sure I haven't missed anything, before formally approving.

https://github.com/llvm/llvm-project/pull/111871