incorrect __vxworks__ usage in longlong.h (3.3) was ok in 3.2.3

[David Edelsohn]

>>>>> Zack Weinberg writes:

Zack> I would encourage you to raise this issue with the GMP maintainers
Zack> as well; they probably have the bug in their version of this file.

	The same test occurs in the GMP distribution.

	I have changed longlong.h in the GCC 3.4 trunk.  It is up to Mark
if this patch is approved for GCC 3.3 branch.

David