Accept a list of statements, each run within its own `--eval' argument. This
allows statements to use reader package namespacing after a package has been
loaded.
* guix/build/lisp-utils.scm (spread-statements): New procedure.
(lisp-invoke): Rename to ...
(lisp-invocation): ... this. Use spread-statements. Change interface to accept
list of statements instead of a single statement.
(asdf-load-all-systems): Simplify returned statements.
(compile-system): Simplify the program passed to `lisp-eval-program'.
(test-system): Likewise.
(generate-executable-for-system): Likewise. Accept the full symbol describing
the asdf operation to use.
(generate-executable): Document the change.
(build-program, build-image): Use the new interface.
b9afcb9ed4