[gdm] configure: bump to 3.31.4

[Ray Strode <halfline src gnome org>]

commit 35f8afc4f9cf146b6c10b324ae57978ba6a13ba0
Author: Ray Strode <rstrode redhat com>
Date:   Mon Jan 7 14:46:57 2019 -0500

    configure: bump to 3.31.4

 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/configure.ac b/configure.ac
index a8dcfbef..c7454ffa 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 
 AC_PREREQ([2.60])
 AC_INIT([gdm],
-        [3.30.2],
+        [3.31.4],
         [http://bugzilla.gnome.org/enter_bug.cgi?product=gdm])
 
 AC_CONFIG_SRCDIR([daemon/gdm-manager.c])