[clang] [lld] [llvm] [llvm-driver] Fix usage of `InitLLVM` on Windows (PR #76306)

[Dimitry Andric via cfe-commits]

DimitryAndric wrote:

Maybe I'm doing something wrong, but after this commit (and its merge to 18.x) I don't see to get stack traces from clang anymore after assertions?  How is this supposed to work?


https://github.com/llvm/llvm-project/pull/76306