[gdm] NEWS: update for release

[Ray Strode <halfline src gnome org>]

commit 9d7bfd67564b3529e9c4d465fe3d40a12be3b0fa
Author: Ray Strode <rstrode redhat com>
Date:   Tue Jun 23 08:07:29 2015 -0400

    NEWS: update for release

 NEWS |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/NEWS b/NEWS
index f56dda1..19e452f 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,11 @@
 ==============
+Version 3.17.3
+==============
+- Support env.d directory for manipulating session environment
+- Drop ConsoleKit support
+- Translation updates
+
+==============
 Version 3.17.2
 ==============
 - BSD fixes