[llvm] [llvm][Support][Windows] Avoid crash calling remove_directories() (PR #118677)

[Martin Storsjö via llvm-commits]

mstorsjo wrote:

> > Unless we can find a workaround I don't see how we can move to std::filesystem, which is very, very annoying 😞
> 
> I can try to file a bug to libstdc++ about it, so that there at least is some path towards being able to use it at some point in the future.

Reported that bug in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118003. That's of course no guarantee that it'll be fixed anytime soon though (and from personal experience, implementing std::filesystem entirely correctly on Windows is a bit fiddly), but at least there is a bug report.

https://github.com/llvm/llvm-project/pull/118677