[Bug libfortran/66936] io/unix.c gratuitously uses S_IRWXG and S_IRWXO on the basis that umask() is available

[fxcoudert at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66936

Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #17 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> ---
(In reply to Steve Kargl from comment #15)
> See comment #6.

Thanks Steve, I had missed that.

Given the history and reasons, I've committed the patch to restore build on
mingw32. Marking as fixed on trunk.