[gnome-photos] Add a missing tag to the AppData file

[Richard Hughes <rhughes src gnome org>]

commit 68fe0082792a3a36c82feb44877002e2da9cf9ce
Author: Richard Hughes <richard hughsie com>
Date:   Mon Jan 25 15:20:47 2016 +0000

    Add a missing tag to the AppData file

 data/org.gnome.Photos.appdata.xml.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/data/org.gnome.Photos.appdata.xml.in b/data/org.gnome.Photos.appdata.xml.in
index d13aa61..d25a9b5 100644
--- a/data/org.gnome.Photos.appdata.xml.in
+++ b/data/org.gnome.Photos.appdata.xml.in
@@ -42,4 +42,5 @@
   <url type="homepage">https://wiki.gnome.org/Apps/Photos</url>
   <updatecontact>debarshir_at_gnome.org</updatecontact>
   <project_group>GNOME</project_group>
+  <translation type="gettext">gnome-photos</translation>
 </application>