[lld] [LLD] Add CLASS syntax to SECTIONS (PR #95323)

[Peter Smith via llvm-commits]

https://github.com/smithp35 commented:

Apologies for taking some time to respond.

I don't have too many comments on the code, following it through it looks like it would implement the specification in `linker_script.rst`. I think it may be worth making a few more tests to look at some feature combinations, but otherwise looks good to me.

https://github.com/llvm/llvm-project/pull/95323