[gnome-boxes] Require Gtk+ 3.19.8

[Zeeshan Ali <zeeshanak src gnome org>]

commit d084a9e6e6c896a38d9f1e44865052d3dcc52e99
Author: Zeeshan Ali <zeenix gmail com>
Date:   Thu Oct 6 16:13:49 2016 +0200

    Require Gtk+ 3.19.8
    
    We required 3.19.4 already and most people will have 3.20 and not these
    development versions anyway so it's not a problem to bump the version
    here. Simply bumping version for the following patch that uses the renamed
    CSS properties in 3.19.4.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 19b0f66..ec04d94 100644
--- a/configure.ac
+++ b/configure.ac
@@ -54,7 +54,7 @@ GLIB_MIN_VERSION=2.38.0
 AC_SUBST(GLIB_MIN_VERSION)
 GOBJECT_INTROSPECTION_MIN_VERSION=0.9.6
 GOVIRT_MIN_VERSION=0.2.0
-GTK_MIN_VERSION=3.19.4
+GTK_MIN_VERSION=3.19.8
 GTK_VNC_MIN_VERSION=0.4.4
 LIBVIRT_GLIB_MIN_VERSION=0.2.3
 LIBVIRT_GCONFIG_MIN_VERSION=0.2.0