[Pkg-lxde-maintainers] Bug#885550: Raise severity for: lxde-core: Don't recommend gksu

[Jeremy Bicha]

Control: severity -1 serious

gksu has been removed from Debian Testing and will be removed from
Unstable soon. It is my understanding that it is a Release Critical
bug for a package to recommend a removed package, since it will keep
the package from being automatically removed on upgrades.

Thanks,
Jeremy Bicha