cosmetic: add copyright header to bsc_control.py

bsc_control.py lacks a copyright header. This commit adds the
copyright header from ipa.py to bsc_control.py.

Change-Id: Ie70bf686ee9bb157198e02bf8d946abf56adc82a
diff --git a/openbsc/contrib/bsc_control.py b/openbsc/contrib/bsc_control.py
index 3a7964d..c1b09ce 100755
--- a/openbsc/contrib/bsc_control.py
+++ b/openbsc/contrib/bsc_control.py
@@ -1,5 +1,26 @@
 #!/usr/bin/python
 # -*- mode: python-mode; py-indent-tabs-mode: nil -*-
+"""
+/*
+ * Copyright (C) 2016 sysmocom s.f.m.c. GmbH
+ *
+ * All Rights Reserved
+ *
+ * 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+"""
 
 from optparse import OptionParser
 from ipa import Ctrl