debian-installer-repository: add secondary packages for d-i

• gnupg2
• ndisc6
• wide-dhcpv6
• wireless-tools
• wpa

Source Build SUCCESS

Results available at: https://jenkins.trisquel.org/job/gitlab-merge-request/1227/

Note, this comment only means that the source build was successful, to know if the binary build was successful please check https://jenkins.trisquel.org/job/gitlab-merge-request/1227/promotion/

merged