[Ac] Mozilla removal?

[Marcin Król]

> Do you have mozilla-libs or other gecko-based libraries installed?
> Probably you have 0 or >=2 packages which provide offending library
> and package name dependency is not added in such case.

I'm blind, as usual. On my builder I've mozilla-1.7.13-2 packages where
libs were moved from /usr/lib to /usr/lib/mozilla. This release didn't
hit Ac, so builder has libs in /usr/lib.

M.