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

[Fangrui Song via llvm-commits]

MaskRay wrote:

Note: per consensus on https://discourse.llvm.org/t/rfc-github-pr-resolve-conversation-button/73178 , "Resolve comment" buttons are for the reviewers to click, not the author.

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