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

[Peter Smith via llvm-commits]

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+# REQUIRES: x86
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smithp35 wrote:

Although unlikely, it should be well defined to have linker scripts with CLASS and `--enable-non-contiguous-regions` is it worth adding a test for the interaction?

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