Previously kexec-tools-anaconda-addon was added to anaconda-tools group in
f25 branch, see commit 439c13c552
Rawhide/f26 also need it thus update comps-f26.xml.in as well
It's not in GNOME core, so it's a bug that it's in the gnome-desktop
group. Keeping it installed is deviation from upstream, so it belongs in
workstation-product. Make the change only for F26 since there's no
immediate benefit and spins might be surprised for it to disappear this
late in the game.
We hope to move it to GNOME core in the future, after a rewrite.
