[accerciser] Fix build with newer appdata

[Samuel Thibault <sthibaul src gnome org>]

commit c7ab5c4e9e7a88d0d371b6241638e4f78330e33f
Author: Samuel Thibault <samuel thibault ens-lyon org>
Date:   Fri Oct 11 02:11:30 2019 +0200

    Fix build with newer appdata

 accerciser.appdata.xml.in | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/accerciser.appdata.xml.in b/accerciser.appdata.xml.in
index 19c1387..d0d6e72 100644
--- a/accerciser.appdata.xml.in
+++ b/accerciser.appdata.xml.in
@@ -23,4 +23,8 @@
   <updatecontact>daniel mustieles gmail com</updatecontact>
   <project_group>GNOME</project_group>
   <translation type="gettext">accerciser</translation>
+  <content_rating type="oars-1.1" />
+  <releases>
+    <release version="3.34.1" date="2019-10-07"/>
+  </releases>
 </component>