[PATCH 10/12] Add another test for setcontext

[Florian Weimer]

* Carlos O'Donell:

> /* The uc_sigmask on IA64 has the wrong type and this needs fixing,
>    but until that change is evaluated, we fix this here with a cast.
>    See bug XXX.  */

Is this really a bug?  After this long, I would consider it just a
quirk of the ia64 API/ABI and move on …