[gnome-control-center] configure: Bump GTK+ requirement to 3.5.8: first version to bring GtkLevelBar.

[Matthias Clasen <matthiasc src gnome org>]

commit f9e052eea0703e0e5d7e33fada7d7d2920f2d3d7
Author: Dominique Leuenberger <dimstar opensuse org>
Date:   Mon Jul 23 15:04:58 2012 +0200

    configure: Bump GTK+ requirement to 3.5.8: first version to bring GtkLevelBar.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=680133

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 0ad2e40..2b8ff0a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -81,7 +81,7 @@ dnl Check that we meet the  dependencies
 dnl ==============================================
 
 GLIB_REQUIRED_VERSION=2.31.0
-GTK_REQUIRED_VERSION=3.5.5
+GTK_REQUIRED_VERSION=3.5.8
 PA_REQUIRED_VERSION=2.0
 CANBERRA_REQUIRED_VERSION=0.13
 GDKPIXBUF_REQUIRED_VERSION=2.23.0