[gthumb] appdata: added kudos

[Paolo Bacchilega <paobac src gnome org>]

commit 75ad36ed2a2485a3a56b4c2c279b489937066ed1
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Mon Dec 21 09:08:31 2015 +0100

    appdata: added kudos

 data/appdata/gthumb.appdata.xml.in |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/data/appdata/gthumb.appdata.xml.in b/data/appdata/gthumb.appdata.xml.in
index 8c1b7ce..faf34a6 100644
--- a/data/appdata/gthumb.appdata.xml.in
+++ b/data/appdata/gthumb.appdata.xml.in
@@ -41,4 +41,10 @@
   </screenshots>
   <url type="homepage">https://wiki.gnome.org/Apps/gthumb</url>
   <updatecontact>paobac_at_src.gnome.org</updatecontact>
+  <kudos>
+    <kudo>AppMenu</kudo>
+    <kudo>HiDpiIcon</kudo>
+    <kudo>ModernToolkit</kudo>
+    <kudo>UserDocs</kudo>
+  </kudos>
 </application>