[Tails-dev] Heads up: updated build dependencies for Tails

Hi,

If you build Tails on Debian Wheezy you may want to add wheezy-backports
to your sources and install `gettext` from it (>= 0.18.3 is now required):

    apt-get install gettext/wheezy-backports

It will actually only be relevant if you try to build the
`feature/jessie` branch, but consider yourselves warned.

The docs have been updated: https://tails.boum.org/contribute/build

Cheers!