logilab-packaging #298403 [debian] fixup logilab-lgp cron snippets [validation pending]

[debian] fixup logilab-lgp cron snippets

They need to deal with the package being removed but not purged.

prioritynormal
typebug
done in1.2.0
load left0.000
closed by#ea1583a0bf7b [debian] fixup logilab-lgp cron snippets (closes #298403)
patch[debian] fixup logilab-lgp cron snippets (closes #298403) [applied]