[Patch] Fix localedata test builds with latest GCC

[Zack Weinberg]

On Wed, Jul 19, 2017 at 3:14 PM, Steve Ellcey <sellcey@cavium.com> wrote:
> While testing the latest glibc sources with the latest (ToT) GCC, I ran
> into some build failures (during testing, not during the glibc build).
> This patch fixes the build failures in the localedata subdirectory.  I
> believe these started failing with this GCC patch:
>
>         https://gcc.gnu.org/ml/gcc-patches/2017-06/msg00537.html
>
> It does not look like older GCC's complain about not understanding this
> option so there does not seem to be any need to conditionalize its usage.

I can't conveniently experiment with GCC 8.x right now, but this seems
like the right general idea.

zw