[empathy] bump GDK_VERSION_MIN_REQUIRED to 3.8

[Guillaume Desmottes <gdesmott src gnome org>]

commit d6dc1b7b7d99b31e304fc862f9dc9a3913fb6552
Author: Guillaume Desmottes <guillaume desmottes collabora co uk>
Date:   Thu Sep 5 09:33:37 2013 +0200

    bump GDK_VERSION_MIN_REQUIRED to 3.8
    
    https://bugzilla.gnome.org/show_bug.cgi?id=707538

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 77be8f4..7f7df8f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -42,7 +42,7 @@ AC_DEFINE(GLIB_VERSION_MIN_REQUIRED, GLIB_VERSION_2_30, [Ignore post 2.30 deprec
 AC_DEFINE(GLIB_VERSION_MAX_ALLOWED, GLIB_VERSION_2_38, [Prevent post 2.38 APIs])
 
 GTK_REQUIRED=3.9.4
-AC_DEFINE(GDK_VERSION_MIN_REQUIRED, GDK_VERSION_3_4, [Ignore post 3.4 deprecations])
+AC_DEFINE(GDK_VERSION_MIN_REQUIRED, GDK_VERSION_3_8, [Ignore post 3.8 deprecations])
 AC_DEFINE(GDK_VERSION_MAX_ALLOWED, GDK_VERSION_3_10, [Prevent post 3.10 APIs])
 
 CLUTTER_REQUIRED=1.10.0