Unreviewed C++ patch for PA (HP assembler)

[Jason Merrill]

>>>>> "John" == John David Anglin <dave@hiauly1.hia.nrc.ca> writes:

> -template class std::__malloc_alloc_template<0>;
>  #ifndef __USE_MALLOC
>  template class std::__default_alloc_template<false, 0>;
>  #endif

I'd remove the other explicit instantiation, too.  If that doesn't break
things for you, go ahead and check it in on the trunk.

Jason