[patch][pr12684] Use the new mingw abi

[Rafael Espíndola]

On 22 November 2013 12:54, Yaron Keren <yaron.keren at gmail.com> wrote:
> I will send you e-mail output from clang -P -E ... it is too big for the
> list.

Thanks. This reduces to

template <class T>
class valarray {
  void bar();
};
extern template void valarray<int>::bar();

which already fails on trunk with "-cxx-abi microsoft". I will report
a bug with this issue and make it block a bug about supporting the new
abi.

Cheers,
Rafael