[gnome-session] configure: bump to 3.21.3

[Ray Strode <halfline src gnome org>]

commit f7d881b7f19bb76784532f5eca812dd8bf2e5e40
Author: Ray Strode <rstrode redhat com>
Date:   Mon Jun 20 15:43:43 2016 -0400

    configure: bump to 3.21.3

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 8937f55..172c9f0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 AC_INIT([gnome-session],
-        [3.21.2],
+        [3.21.3],
         [http://bugzilla.gnome.org/enter_bug.cgi?product=gnome-session])
 
 AC_CONFIG_SRCDIR([gnome-session])