Slightly optimize the memoizer, bootstrap evaluator, and `(ice-9 eval)'.

Slightly optimize the memoizer, bootstrap evaluator, and `(ice-9 eval)'.

* libguile/eval.c (CAR, CDR, CAAR, CADR, CDAR, CDDR, CADDR, CDDDR): Use
  the macro variants, not the functions.
  (eval)[SCM_M_CALL]: When invoking a VM program, accumulate its
  arguments on the stack rather than on the heap.

* libguile/memoize.c (CAR, CDR, CAAR, CADR, CDAR, CDDR, CADDR, CDDDR,
  CADDR): Use the macro variants, not the functions.
  (scm_memoized_expression_typecode): Use `SCM_I_MAKINUM' instead of
  `scm_from_uint16'.