I'm not completely sure what is best, but I added an explicit `--without-dlltool` flag to `winebuild`, so that it keeps its current behavior unless explicitly requested to avoid dlltool. Wine build does that but maybe we do not want to make it the default yet?
If it's fine to make it the default already I can reverse the flag to a `--force-dlltool` like I initially intended, used when LLVM or MSVC-like dlltool is available, until we are able and willing to replace them too.