* guix/build-system/asdf.scm (lower): Change argument name to `lisp-type'.
(asdf-build): Change argument name to `lisp-type'. Remove `lisp' as an
argument to the returned procedure. Change the argument passed to build
phases to `lisp-type'.
* guix/build/asdf-build-system.scm (copy-source, build, check)
(create-asd-file, symlink-asd-files, cleanup-files, strip): Respect
`lisp-type` argument.
* gnu/packages/lisp.scm (sbcl-stumpwm, sbcl-stumpwm+slynk): Likewise.