[cogl] doc: Add 2013 in the Copyright statement

[Damien Lespiau <dlespiau src gnome org>]

commit 1be3b40624b1619ea367804c9c44549770aea2a8
Author: Damien Lespiau <damien lespiau intel com>
Date:   Tue Jan 1 14:19:18 2013 +0000

    doc: Add 2013 in the Copyright statement

 doc/reference/cogl2/cogl2-docs.xml.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/doc/reference/cogl2/cogl2-docs.xml.in b/doc/reference/cogl2/cogl2-docs.xml.in
index 3b09af3..e0840df 100644
--- a/doc/reference/cogl2/cogl2-docs.xml.in
+++ b/doc/reference/cogl2/cogl2-docs.xml.in
@@ -19,6 +19,7 @@
       <year>2010</year>
       <year>2011</year>
       <year>2012</year>
+      <year>2013</year>
       <holder>Intel Corporation</holder>
     </copyright>