PATCH: Check __x86_64__ instead of __WORDSIZE in bits/setjmp.h

[Roland McGrath]

> How about this patch?  It defines
> 
> typedef long long int __jmp_buf[8];
> 
> only for x86-64 with __WORDSIZE != 64.

That is appropriately paranoid.  It can go in now.

I suspect the simpler one might well be fine, and if others weigh in that
it is safe then we can simplify.


Thanks,
Roland