[gnome-photos/wip/facebook] appdata: Add a screenshot

[Álvaro Peña <alvaropg src gnome org>]

commit 0c78377ecbef4f53304bb9ba7ec4c1af227730ff
Author: Debarshi Ray <debarshir gnome org>
Date:   Thu Sep 26 13:33:28 2013 +0200

    appdata: Add a screenshot

 data/gnome-photos.appdata.xml.in |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/data/gnome-photos.appdata.xml.in b/data/gnome-photos.appdata.xml.in
index 5275b77..0d093ad 100644
--- a/data/gnome-photos.appdata.xml.in
+++ b/data/gnome-photos.appdata.xml.in
@@ -22,6 +22,9 @@
       <li>Allow opening full featured editor for more advanced changes</li>
     </_ul>
   </description>
+  <screenshots>
+    <screenshot type="default" width="940" 
height="592">https://help.gnome.org/misc/release-notes/3.10/figures/gnome-photos.png</screenshot>
+  </screenshots>
   <url type="homepage">https://wiki.gnome.org/Apps/Photos</url>
   <updatecontact>debarshir_at_gnome.org</updatecontact>
 </application>