[devhelp] build: bump GTK+ requirement to 3.5.6

[Aleksander Morgado <aleksm src gnome org>]

commit a74c6ec653f7eedcb68d544f661e993c8370489c
Author: Aleksander Morgado <aleksander lanedo com>
Date:   Fri Feb 1 15:05:57 2013 +0100

    build: bump GTK+ requirement to 3.5.6
    
    Required for GtkSearchEntry.

 configure.ac |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index f2fa829..6751790 100644
--- a/configure.ac
+++ b/configure.ac
@@ -77,13 +77,13 @@ AC_SUBST(LIBM)
 
 PKG_CHECK_MODULES(DEVHELP, [
   gthread-2.0 >= 2.10.0
-  gtk+-3.0 >= 3.4
+  gtk+-3.0 >= 3.5.6
   $WEBKITGTK_PC_NAME >= $WEBKITGTK_REQUIRED_VERSION
   gio-2.0 >= 2.32
 ])
 
 PKG_CHECK_MODULES(LIBDEVHELP, [
-  gtk+-3.0 >= 3.4
+  gtk+-3.0 >= 3.5.6
   gio-2.0 >= 2.32
   $gconf_pkgconfig
   $gtkmacintegration_pkgconfig