[gnome-session] configure: bump to 3.21.4

[Ray Strode <halfline src gnome org>]

commit 9d3b97ca973f7ab8ea0358b223a1d47685677425
Author: Ray Strode <rstrode redhat com>
Date:   Fri Jul 22 13:31:38 2016 -0400

    configure: bump to 3.21.4

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index e9f1ae0..dbfc7d3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 AC_INIT([gnome-session],
-        [3.21.3],
+        [3.21.4],
         [http://bugzilla.gnome.org/enter_bug.cgi?product=gnome-session])
 
 AC_CONFIG_SRCDIR([gnome-session])