conformtest: Remove some bogus sys/types.h expectations for XPG3 and XPG4.

conformtest: Remove some bogus sys/types.h expectations for XPG3 and XPG4.

The conformtest tests for sys/types.h for XPG3 and XPG4 fail because
of missing blksize_t.  This is a bug in the expectations; that type is
not part of those standards.  This patch stops the tests from
expecting it, and some other types that also are not part of XPG3 and
XPG4.

Tested for x86_64 and x86.

	* conform/data/sys/types.h-data (blkcnt_t): Do not expect for
	[XPG3 || XPG4].
	(blksize_t): Likewise.
	(clockid_t): Likewise.
	* conform/Makefile (test-xfail-XPG3/sys/types.h/conform): Remove
	variable.
	(test-xfail-XPG4/sys/types.h/conform): Likewise.