[Bug bootstrap/69757] OpenBSD requires -fPIC to build.

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69757

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Wrong config.log.  I want the one under libstdc++-v3 directory.