travis: added license header for travis scripts

dist/tools/travis-scripts/build_and_test.sh

 #!/bin/bash
+#
+# Copyright (C) 2015 Philipp Rosenkranz <philipp.rosenkranz@fu-berlin.de>
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+#
+
 set -e
 
 if [[ $BUILDTEST_MCU_GROUP ]]

dist/tools/travis-scripts/get-pkg-list.py

 #!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# Copyright (C) 2015  Philipp Rosenkranz <philipp.rosenkranz@fu-berlin.de>
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library 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
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301 USA
 
 import os