Revert "use disco instead of unmaintained ppa"

This reverts commit 5dcedc2f34.

helpers/make-toxcore

@@ -0,0 +1,26 @@
+#!/bin/sh
+#
+#    Copyright (C) 2015 fr33domlover <fr33domlover@riseup.net>
+#
+#    This program is free software; you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation; either version 3 of the License, or
+#    (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+VERSION=1
+EXTERNAL='deb-src http://ppa.launchpad.net/i2p.packages/i2p/ubuntu $UPSTREAM main'
+REPOKEY="D1386E5F3FC3365C"
+
+. ./config
+
+changelog "Bring Tox to Trisquel from PPA"
+
+compile