[clutter] Bump GLib dependency

[Emmanuele Bassi <ebassi src gnome org>]

commit 14bd6eaad4672ce488986aa2609a5c0ad69adc2b
Author: Emmanuele Bassi <ebassi linux intel com>
Date:   Mon Sep 19 17:51:23 2011 +0100

    Bump GLib dependency
    
    We have been using g_slist_free_full() which was added in GLib 2.28, and
    yet we neved bumped the GLib dependency. Whoopsie.

 configure.ac |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 024658d..0dc91b6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -113,8 +113,8 @@ LT_INIT([disable-static])
 AC_HEADER_STDC
 
 # required versions for dependencies
-m4_define([glib_req_version],           [2.26.0])
-m4_define([cogl_req_version],           [1.7.6])
+m4_define([glib_req_version],           [2.28.0])
+m4_define([cogl_req_version],           [1.7.8])
 m4_define([json_glib_req_version],      [0.12.0])
 m4_define([atk_req_version],            [2.1.5])
 m4_define([cairo_req_version],          [1.10])