[clutter] Bump up the dependency on gtk-doc

[Emmanuele Bassi <ebassi src gnome org>]

commit d93e6ef6b9b259f4561dc1517246d0da89e134e1
Author: Emmanuele Bassi <ebassi linux intel com>
Date:   Fri Oct 14 11:34:26 2011 +0100

    Bump up the dependency on gtk-doc

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 4665f14..888bb3d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -121,7 +121,7 @@ m4_define([cairo_req_version],          [1.10])
 m4_define([pango_req_version],          [1.20])
 m4_define([gi_req_version],             [0.9.5])
 m4_define([uprof_req_version],          [0.3])
-m4_define([gtk_doc_req_version],        [1.13])
+m4_define([gtk_doc_req_version],        [1.15])
 m4_define([xfixes_req_version],         [3])
 m4_define([xcomposite_req_version],     [0.4])