[lld] [lld][COFF] Fix: Merge `.drectve` sections in ObjFile::readSections (PR #86380)

[Martin Storsjö via llvm-commits]

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+; Presently, the LLVM tooling incorrectly coalesces '.drectve' sections. So,
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mstorsjo wrote:

I would remove this comment - the assumption that the current tool behaviour is incorrect, is not necessarily true.

https://github.com/llvm/llvm-project/pull/86380