[Bug middle-end/117342] .base64 emitted when gas doesn't support it

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117342

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
We need the config.log from the gcc subdirectory not the one from the toplevel.