[gnome-flashback] bump gsettings-desktop-schemas required version

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 5e0c2e79473e76ac99d7fa6dd68d41945024449f
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sat Jun 11 21:09:03 2016 +0300

    bump gsettings-desktop-schemas required version

 configure.ac |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index e953714..8b45e42 100644
--- a/configure.ac
+++ b/configure.ac
@@ -110,7 +110,7 @@ GTK_REQUIRED=3.19.5
 LIBGNOME_DESKTOP_REQUIRED=3.12.0
 CANBERRA_REQUIRED=0.13
 GLIB_REQUIRED=2.44.0
-GSETTINGS_DESKTOP_SCHEMAS_REQUIRED=3.19.3
+GSETTINGS_DESKTOP_SCHEMAS_REQUIRED=3.21.2
 POLKIT_AGENT_REQUIRED=0.97
 POLKIT_GOBJECT_REQUIRED=0.97
 IBUS_REQUIRED=1.5.2
@@ -177,6 +177,7 @@ PKG_CHECK_MODULES([INPUT_SETTINGS], [
 PKG_CHECK_MODULES([INPUT_SOURCES], [
   gnome-desktop-3.0 >= $LIBGNOME_DESKTOP_REQUIRED
   gtk+-3.0 >= $GTK_REQUIRED
+  gsettings-desktop-schemas >= $GSETTINGS_DESKTOP_SCHEMAS_REQUIRED
   ibus-1.0 >= $IBUS_REQUIRED
   pango
   xkbfile