This drops the abuse of make dependencies to factor our steps
in l10n repacks and language packs.
It's replaced with clobbers, libs, and the packaging, which
can be shared between installers and the language pack.

MozReview-Commit-ID: 2vEHp0QogXQ

--HG--
extra : rebase_source : c14f0b17904f8f9e0e3f004384c2a292ceeafe4f
extra : source : e95f8bd7b5190bf1d3fae75a88a15ebbe6613809