The 'asd-operation' parameter can be used to specify the ASDF operation to use
in the build phase. It's default value is "load-system".
* guix/build-system/asdf.scm (package-with-build-system, asdf-build): Add
'asd-operation' parameter.
* guix/build/asdf-buid-system.scm (build): Add 'asd-operation' parameter and
use it.
* guix/build/lisp-utils.scm (compile-systems): Add 'asd-operation' parameter
and use it.