[lld] [llvm] [lld][DebugInfo/BTF] Add BTF section merging and deduplication (PR #183915)

[Peter Smith via llvm-commits]

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+//===- BTFBuilder.h - BTF builder/writer -----------------------*- C++ -*-===//
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smithp35 wrote:

Will be worth adding reviewers from llvm/DebugInfo. While putting the code here is likely the best place, it may be out of the scope of a purely lld review for such a large amount of code.

https://github.com/llvm/llvm-project/pull/183915