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

[Richard Hughes <rhughes src gnome org>]

commit e163295768e1aaf026b531acf8122b34186cf0ba
Author: Richard Hughes <richard hughsie com>
Date:   Mon Jan 25 16:15:26 2016 +0000

    Add a missing tag to the AppData file

 data/gnome-tweak-tool.appdata.xml.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/data/gnome-tweak-tool.appdata.xml.in b/data/gnome-tweak-tool.appdata.xml.in
index 0180aa9..caefbb6 100644
--- a/data/gnome-tweak-tool.appdata.xml.in
+++ b/data/gnome-tweak-tool.appdata.xml.in
@@ -24,4 +24,5 @@
   <update_contact>john stowers gmail com</update_contact>
   <url type="bugtracker">https://bugzilla.gnome.org/enter_bug.cgi?product=gnome-tweak-tool</url>
   <url type="donation">http://www.gnome.org/friends/</url>
+  <translation type="gettext">gnome-tweak-tool</translation>
 </component>