[clutter] Bump up the GLib requirement

[Emmanuele Bassi <ebassi src gnome org>]

commit 66243ea57052aeada0a20f524a934bea0d0cc2d5
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Aug 8 11:20:02 2017 +0100

    Bump up the GLib requirement
    
    We are using a newer glib-genmarshal, so we should be using a newer
    GLib as well.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 8a477ce..4ec5a9a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -119,7 +119,7 @@ LT_LIB_M
 AC_HEADER_STDC
 
 # required versions for dependencies
-m4_define([glib_req_version],           [2.44.0])
+m4_define([glib_req_version],           [2.53.4])
 m4_define([cogl_req_version],           [1.21.2])
 m4_define([json_glib_req_version],      [0.12.0])
 m4_define([atk_req_version],            [2.5.3])