port r 13033 from 1.1: Add changelog

ChangeLog

@@ -87,6 +87,13 @@ Small changes:
   * Rename function starpu_trace_user_event() as
     starpu_fxt_trace_user_event()
 
+StarPU 1.1.3 (svn revision xxx)
+==============================================
+The scheduling context release
+
+New features:
+  * One can register an existing on-GPU buffer to be used by a handle.
+
 StarPU 1.1.2 (svn revision xxx)
 ==============================================
 The scheduling context release