[ia64-abi] Issue reminder

[Martin von Loewis]

> We could take another approach, more drastic on the surface, but
> more in keeping with the C2000 standard.  That would be to remove
> __int64 and __float80, and instead use the C2000 stdint.h and the
> equivalent for floats (which we'd have to define).

Yes! Were is it written that IA64 *has* to have a magic __int64 type?
<stdint.h> was specifically designed to not require such types, and
improve portability.

Martin