build: Bump up the Cogl requirement

Clutter requires a new version of Cogl's API, but we never bumped the
requirement inside configure.ac.

diff --git a/configure.ac b/configure.ac
index 3a44046..d2f46c7 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -130,7 +130,7 @@ AC_HEADER_STDC
 
 # required versions for dependencies
 m4_define([glib_req_version],           [2.31.0])
-m4_define([cogl_req_version],           [1.9.1])
+m4_define([cogl_req_version],           [1.9.4])
 m4_define([json_glib_req_version],      [0.12.0])
 m4_define([atk_req_version],            [2.1.5])
 m4_define([cairo_req_version],          [1.10])