[gnome-session] NEWS: update for release

[Ray Strode <halfline src gnome org>]

commit 11fbbc04a7fd9be6e6497d0f1cd62f28715f6bc8
Author: Ray Strode <rstrode redhat com>
Date:   Thu May 26 17:09:00 2016 -0400

    NEWS: update for release

 NEWS |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/NEWS b/NEWS
index f8c3a7b..1d7e7bf 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,12 @@
 ==============
+Version 3.21.2
+==============
+
+       * Switch back to wayland by default
+       * Update bus activation environment at startup
+       * Translation updates
+
+==============
 Version 3.20.1
 ==============