wanted: dx allocation for MAKE-LIST

[Nikodemus Siivola]

EOM.

[Tobias C. Rittweiler (tcr)]

A comment in %MAP-FOR-EFFECT in src/code/seq.lisp says

    ;; this is almost efficient (except in the general case where we
    ;; trampoline to MAKE-SEQUENCE-ITERATOR; if we had DX allocation
    ;; of MAKE-LIST, the whole of %MAP would be cons-free.

So if dx allocation for MAKE-LIST is introduced, one should probably
also check its effect on %MAP.