voice,call,cinterion: add Purism as copyright holder

The GSM supplementary services related changes, as well as the rework
done to manage calls per call id, is copyrighted by Purism SPC.

src/mm-base-call.c

@@ -12,6 +12,7 @@
  *
  * Copyright (C) 2015 Riccardo Vangelisti <riccardo.vangelisti@sadel.it>
  * Copyright (C) 2019 Aleksander Morgado <aleksander@aleksander.es>
+ * Copyright (C) 2019 Purism SPC
  */
 
 #include <config.h>

src/mm-base-call.h

@@ -11,6 +11,7 @@
  * GNU General Public License for more details:
  *
  * Copyright (C) 2015 Riccardo Vangelisti <riccardo.vangelisti@sadel.it>
+ * Copyright (C) 2019 Purism SPC
  */
 
 #ifndef MM_BASE_CALL_H

src/mm-broadband-modem.c

@@ -13,7 +13,8 @@
  * Copyright (C) 2008 - 2009 Novell, Inc.
  * Copyright (C) 2009 - 2012 Red Hat, Inc.
  * Copyright (C) 2011 - 2012 Google, Inc.
- * Copyright (C) 2015 - Marco Bascetta <marco.bascetta@sadel.it>
+ * Copyright (C) 2015 Marco Bascetta <marco.bascetta@sadel.it>
+ * Copyright (C) 2019 Purism SPC
  */
 
 #include <config.h>

src/mm-iface-modem-voice.c

@@ -10,7 +10,8 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details:
  *
- * Copyright (C) 2015 - Marco Bascetta <marco.bascetta@sadel.it>
+ * Copyright (C) 2015 Marco Bascetta <marco.bascetta@sadel.it>
+ * Copyright (C) 2019 Purism SPC
  */
 
 #include <ModemManager.h>

src/mm-iface-modem-voice.h

@@ -10,7 +10,8 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details:
  *
- * Copyright (C) 2015 - Marco Bascetta <marco.bascetta@sadel.it>
+ * Copyright (C) 2015 Marco Bascetta <marco.bascetta@sadel.it>
+ * Copyright (C) 2019 Purism SPC
  */
 
 #ifndef MM_IFACE_MODEM_VOICE_H