Add missing dh_lintian call

This call is needed to copy to the override files to the correct
location in the binary package. Without this helper lintian errors
in the binary package cannot be overridden.
Fix Lintian error 'helper-templates-in-copyright'
Silence some Lintian errors
Merge pull request #3 from mark0n/lintian

Fix/silence Lintian errors