[Bug libstdc++/78167] experimental/filesystem calls behave differently between Linux gcc 5.3.0 and Windows Visual Studio 2015

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78167

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I'm going to backport all the <experimental/filesystem> fixes to the
gcc-5-branch soon, so this will be fixed for 5.5