[gnome-session] configure: prerelease bump to 3.21.1

[Ray Strode <halfline src gnome org>]

commit e4ed5b44571ec146825b2b5e2d3248cb7c25ca18
Author: Ray Strode <rstrode redhat com>
Date:   Mon Mar 7 14:57:22 2016 -0500

    configure: prerelease bump to 3.21.1
    
    We branched gnome-3-20 early to accomodate switching the default
    session back to Xorg.
    
    This commit bumps configure 3.21.1 to minimize confusion on
    which branch is for what purpose.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 5e88a2a..a0dc4d3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 AC_INIT([gnome-session],
-        [3.19.91],
+        [3.21.1],
         [http://bugzilla.gnome.org/enter_bug.cgi?product=gnome-session])
 
 AC_CONFIG_SRCDIR([gnome-session])