Code review comment for ~lamoura/update-notifier:bionic-fix-translations-on-script

We had a call, and decided on the following:
- leave the translation fix as is. We don't know of a way to mark a string inside a longer translatable string to NOT be translated, so let's just remove the translation for $packages everywhere.
- to avoid unnecessary risk, instead of generating the autoconf files in bionic for each build, just restore the generated files that exist in the current source package in bionic in the ubuntu archive.