[gtk+] Bump up the required version of GLib

[Emmanuele Bassi <ebassi src gnome org>]

commit 5e9f77670bb7bbc658ee02507aca81c982b054fb
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Sun Apr 2 17:25:46 2017 +0100

    Bump up the required version of GLib
    
    GLib 2.53 deprecated g_object_newv() and GParameter. If we want to stop
    using those types without resorting to pretty convoluted pre-processor
    dancing, we will need to bump up the dependency inside GTK+.

 configure.ac |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 51b2d34..caaae26 100644
--- a/configure.ac
+++ b/configure.ac
@@ -42,8 +42,8 @@ m4_define([gtk_binary_version], [4.0.0])
 
 # required versions of other packages
 m4_define([glib_required_major], [2])
-m4_define([glib_required_minor], [51])
-m4_define([glib_required_micro], [5])
+m4_define([glib_required_minor], [53])
+m4_define([glib_required_micro], [0])
 m4_define([glib_required_version],
           [glib_required_major.glib_required_minor.glib_required_micro])
 m4_define([glib_min_required_minor],