update: Use ALL_DIRS for completion
update: Use ALL_DIRS for completion

It does not change the outcome, but it is nicer
to use the same value in coomplete as for the
main function.

Closes: #2534
Approved by: alexlarsson

flatpak/flatpak,flatpak/flatpak,matthiasclasen/flatpak,flatpak/flatpak,matthiasclasen/flatpak,matthiasclasen/flatpak,matthiasclasen/flatpak,matthiasclasen/flatpak,flatpak/flatpak,flatpak/flatpak