[PATCH, libstdc++]: Fix testsuite FAILs related to missing de_DE.UTF-8 locale

[Jonathan Wakely]

On 30/08/16 13:19 +0200, Uros Bizjak wrote:
>Hello!
>
>There are several libstdc++ testsuite FAILs on systems where
>de_DE.UTF-8 locale is missing.
>
>Apparently, following "dg-do run" directive overrides
>dg-require-namedlocale requirement.

Yes, a dg-do with a target selector will decide whether to run the
test or not based on the target, and ignore any previous dg-require-*

This is documented at
https://gcc.gnu.org/onlinedocs/gccint/Directives.html and I noticed
some incorrect tests while adding the { target c++11 } selectors but
didn't get around to fixing them.

Thanks for fixing these.