[gnome-shell] build: Bump gsettings-desktop-schemas requirement

[Marinus Schraal <mschraal src gnome org>]

commit 0dac0ad5167badf62a334eb1d46c9f4ff5e8f4fe
Author: Marinus Schraal <mschraal src gnome org>
Date:   Tue Jul 19 17:06:21 2016 +0200

    build: Bump gsettings-desktop-schemas requirement
    
    Require at least 3.21.3 for the MRU input source schema.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=768956

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 9dd9826..685b9d0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -119,7 +119,7 @@ PKG_CHECK_MODULES(SHELL_PERF_HELPER, gtk+-3.0 gio-2.0)
 PKG_CHECK_MODULES(SHELL_HOTPLUG_SNIFFER, gio-2.0 gdk-pixbuf-2.0)
 PKG_CHECK_MODULES(TRAY, mutter-clutter-1.0 gtk+-3.0)
 PKG_CHECK_MODULES(GVC, libpulse >= $PULSE_MIN_VERS libpulse-mainloop-glib gobject-2.0)
-PKG_CHECK_MODULES(DESKTOP_SCHEMAS, gsettings-desktop-schemas >= 3.21.2)
+PKG_CHECK_MODULES(DESKTOP_SCHEMAS, gsettings-desktop-schemas >= 3.21.3)
 
 AC_ARG_ENABLE(browser-plugin,
               [AS_HELP_STRING([--enable-browser-plugin],