[clutter] build: Bump up Cogl dependency

[Emmanuele Bassi <ebassi src gnome org>]

commit b751b90bc014666ddf0e0f1d220c949403f72185
Author: Emmanuele Bassi <ebassi linux intel com>
Date:   Wed Nov 2 13:03:26 2011 +0000

    build: Bump up Cogl dependency
    
    The newly added cogl-xlib.h header is available since Cogl 1.9, so we
    need to bump up the dependency.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 8545dbb..966626b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -114,7 +114,7 @@ AC_HEADER_STDC
 
 # required versions for dependencies
 m4_define([glib_req_version],           [2.31.0])
-m4_define([cogl_req_version],           [1.8.0])
+m4_define([cogl_req_version],           [1.9.1])
 m4_define([json_glib_req_version],      [0.12.0])
 m4_define([atk_req_version],            [2.1.5])
 m4_define([cairo_req_version],          [1.10])