Better NTH-VALUES for non-constant N
Express the target architecture uniqueness test less repetitively.
Remove :TEST-NOT option from internal-use-only FIND-IN/POSITION-IN.

See related remarks at DEFINE-FIND-POSITION-IF-NOT in 'seqtran'
Implement sb_mkstemp using the real mkstemp except on win32.
Change pseudo-random hash values in CTYPE things to quasi-random.

They're now address-based for the target lisp, random for the host.
Cache performance is essentially unchanged; generating a hash is faster.