Update Kawa backend for separate swank-repl package.

* swank-kawa.scm (|swank-repl:create-repl|): Renamed from
create-repl.
(|swank-repl:listener-eval|): Renamed from listener-eval.
(defslimefun, %defslimefun, lookup-slimefun): Put "qualified"
symbols in *slime-funs*