WITH_LIBCPLUSPLUS buildworld broken on STABLE-9

[Oleg V. Nauman]

Quoting Dimitry Andric <dim at FreeBSD.org>:

> On 2012-11-02 19:22, Oleg V. Nauman wrote:
> ...
>> /usr/src/lib/libc++/../../contrib/libc++/include/cstdlib:134:9: error:
>> no member named
>>        'at_quick_exit' in the global namespace
>> using ::at_quick_exit;
>>        ~~^
>
> This was fixed in head by r242472, I will merge it as soon as the MFC
> timer expires (Nov 5).  Sorry about the breakage, this was my fault.

  No problem. Thanks for your hard work.

>
> In the meantime, you can use the attached diff.
>

  That patch fixes the issue, thank you.