[llvm] [llvm-shlib] Fix the version naming style of libLLVM for Windows (PR #85710)

[Martin Storsjö via llvm-commits]

mstorsjo wrote:

> Thanks. Note that it's `libLLVM-18.1.dll` in MSYS2 atm since we pached it differently to align with unix (major.minor being the new ABI version since v18 from what I understand)

Oh, ok, I see - yeah in that case, if you've already patched around it, this isn't an issue at all. The earlier changes slipped past me as they didn't break the build for me.

https://github.com/llvm/llvm-project/pull/85710