[gtk+] about dialog: add docs for new GtkLicense values

[William Jon McCann <mccann src gnome org>]

commit bfd27445e6eb66fa5448e333990aba8a26d22882
Author: William Jon McCann <william jon mccann gmail com>
Date:   Mon Dec 16 11:49:02 2013 -0500

    about dialog: add docs for new GtkLicense values

 gtk/gtkaboutdialog.h |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtkaboutdialog.h b/gtk/gtkaboutdialog.h
index 302e763..e2a5578 100644
--- a/gtk/gtkaboutdialog.h
+++ b/gtk/gtkaboutdialog.h
@@ -47,13 +47,17 @@ typedef struct _GtkAboutDialogPrivate GtkAboutDialogPrivate;
  * @GTK_LICENSE_UNKNOWN: No license specified
  * @GTK_LICENSE_CUSTOM: A license text is going to be specified by the
  *   developer
- * @GTK_LICENSE_GPL_2_0: The GNU General Public License, version 2.0
- * @GTK_LICENSE_GPL_3_0: The GNU General Public License, version 3.0
- * @GTK_LICENSE_LGPL_2_1: The GNU Lesser General Public License, version 2.1
- * @GTK_LICENSE_LGPL_3_0: The GNU Lesser General Public License, version 3.0
+ * @GTK_LICENSE_GPL_2_0: The GNU General Public License, version 2.0 or later
+ * @GTK_LICENSE_GPL_3_0: The GNU General Public License, version 3.0 or later
+ * @GTK_LICENSE_LGPL_2_1: The GNU Lesser General Public License, version 2.1 or later
+ * @GTK_LICENSE_LGPL_3_0: The GNU Lesser General Public License, version 3.0 or later
  * @GTK_LICENSE_BSD: The BSD standard license
  * @GTK_LICENSE_MIT_X11: The MIT/X11 standard license
  * @GTK_LICENSE_ARTISTIC: The Artistic License, version 2.0
+ * @GTK_LICENSE_GPL_2_0_ONLY: The GNU General Public License, version 2.0 only. Since 3.12.
+ * @GTK_LICENSE_GPL_3_0_ONLY: The GNU General Public License, version 3.0 only. Since 3.12.
+ * @GTK_LICENSE_LGPL_2_1_ONLY: The GNU Lesser General Public License, version 2.1 only. Since 3.12.
+ * @GTK_LICENSE_LGPL_3_0_ONLY: The GNU Lesser General Public License, version 3.0 only. Since 3.12.
  *
  * The type of license for an application.
  *