[lld] [LLD] Tombstone LocalTU entry in .debug_names (PR #70701)

[David Blaikie via llvm-commits]

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dwblaikie wrote:

I'd go further, not making it a valid .debug_names section - like the tests in debug-dead-reloc.s (or it could even be added to that - it tests comdat .text already, so it could test comdat .debug_types too) - that tests special cases for .debug_loc and .debug_ranges, for instance, but doesn't have whole valid loclists or range lists.

(but mostly whatever @maskray's happy with)

https://github.com/llvm/llvm-project/pull/70701