conformtest: Fix pselect expectations.

conformtest: Fix pselect expectations.

conformtest expected pselect for XOPEN2K and POSIX2008 (correctly),
but not for XOPEN2K8 (wrongly).  This patch fixes the data to expect
it for XOPEN2K8 as well.

(As for all such fixes based on failures seen from the tests, there is
no guarantee that the data is fully correct for a particular standard
after the fix; headers and data may well have matching bugs.  So far
I've only reviewed ISO, ISO99, ISO11 and POSIX data in detail, though
I hope eventually to review the others.)

Tested for x86_64 and x86.

	* conform/data/sys/select.h-data [XOPEN2K8] (pselect): Expect.
	* conform/Makefile (test-xfail-XOPEN2K8/sys/select.h/conform):
	Remove variable.
	(test-xfail-XOPEN2K8/sys/time.h/conform): Likewise.
	(test-xfail-XOPEN2K8/utmpx.h/conform).