[patch libstdc++]: Fix PR/51673

[Paolo Carlini]

Hi,
> Hello,
>
> additionally to the suggested patch by Pawel Sikora, I added the
> adjustments for mt-allocator to it too.
>
> ChangeLog
>
> 2012-01-01  Kai Tietz<ktietz@redhat.com>
>
>          PR libstc++/51673
>        * config/abi/pre/gnu-versioned-namespace.ver: Adjusted new/delete
>        operators signature for LLP64 size_t, and adjusted signatures for
>        mt-allocator using size_t.
>
> Tested for x86_64-w64-mingw32, and regression tested also for
> x86_64-unknown-linux-gnu.  Ok for apply to trunk and 4.6.x?
Benjamin, can you have a look to this? I suspect the other established 
allocators (like, eg, pool) should be also dealt with, but I don't know 
versioned namespace well enough to properly review the patch.

Thanks,
Paolo.