[lld] [llvm] RFC: [LLD] [COFF] Fix linking MSVC generated implib header objects (PR #122811)

[Martin Storsjö via llvm-commits]

mstorsjo wrote:

> Or should we create a synthetic `coff_symbol_generic` with a zero `Value`?

This approach seems quite straightforward, and doesn't require adjusting the existing `DefinedRegular` class at all, so this looks to me like the best compromise so far.

https://github.com/llvm/llvm-project/pull/122811