* build-aux/list-packages.scm (lookup-gnu-package): New procedure. (package->sxml): Add the package logo, when available, next to the description.
* build-aux/list-packages.scm (list-packages): Install the "C" locale. Write out as UTF-8.
* build-aux/list-packages.scm: New file. * Makefile.am (EXTRA_DIST): Add it.