[Bug libstdc++/88881] std::filesystem::status gives bad results on mingw32

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88881

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #4)
> This bug is the cause of:
> 
> FAIL: experimental/filesystem/operations/canonical.cc execution test

And also:

FAIL: experimental/filesystem/operations/temp_directory_path.cc execution test

because GetTempPathW always returns a directory with a trailing slash.