gnu: Fix package references.

gnu: Fix package references.

* gnu/packages/algebra.scm (iml)[inputs]: Correctly refer to package
inputs.
* gnu/packages/astronomy.scm (xplanet),
* gnu/packages/audio.scm (redkite, libaudec, lv2lint, lv2toweb),
* gnu/packages/bioconductor.scm (r-cummerbund),
* gnu/packages/chicken.scm (chicken),
* gnu/packages/conky.scm (conky),
* gnu/packages/cran.scm (r-latex2exp),
* gnu/packages/crates-io.scm (rust-rgb),
* gnu/packages/databases.scm (mariadb),
* gnu/packages/diffoscope.scm (reprotest),
* gnu/packages/file-systems.scm (glusterfs),
* gnu/packages/finance.scm (electron-cash),
* gnu/packages/games.scm (rinutils, ksudoku, kdiamond, kigo),
* gnu/packages/geo.scm (grass),
* gnu/packages/gnome.scm (libmediaart, gnome-contacts, geoclue),
* gnu/packages/gnucash.scm (aqbanking),
* gnu/packages/image.scm (mtpaint),
* gnu/packages/kde-internet.scm (kopete, ktorrent),
* gnu/packages/kde-utils.scm (kmousetool, kmouth, kronometer),
* gnu/packages/linphone.scm (liblinphone),
* gnu/packages/maths.scm (ppl),
* gnu/packages/mercury.scm (mercury-minimal),
* gnu/packages/music.scm (bjumblr, bschaffl, lsp-plugins,
spectacle-analyzer, helm, tap-lv2, wolf-shaper, shiru-lv2),
* gnu/packages/networking.scm (restinio),
* gnu/packages/prolog.scm (swi-prolog),
* gnu/packages/python-web.scm (gunicorn),
* gnu/packages/python-xyz.scm (python-docusign-esign),
* gnu/packages/ruby.scm (ruby-cucumber, ruby_version, ruby-addressable),
* gnu/packages/sagemath.scm (python-cypari2),
* gnu/packages/skarnet.scm (s6-linux-init),
* gnu/packages/vpn.scm (sshuttle),
* gnu/packages/web.scm (libcyaml),
* gnu/packages/xdisorg.scm (kbdd),
* gnu/packages/xorg.scm (xpra): Same.