[gtk] Add release info to our demo apps

[Emmanuele Bassi <ebassi src gnome org>]

commit 3d6a456c85a36de029bd0fbbeb9eba5f387d2c0c
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Thu Mar 28 12:16:53 2019 +0000

    Add release info to our demo apps
    
    The appstream-util check performed by Flatpak on recent GNOME SDKs has
    become more stringent, and now it requires a <release> tag in the
    AppData XML file. If we don't have it, the Flatpak bundles of gtk-demo
    and gtk-widget-factory will fail on our CI infrastructure.

 demos/gtk-demo/org.gtk.Demo.appdata.xml                | 7 +++++++
 demos/widget-factory/org.gtk.WidgetFactory.appdata.xml | 7 +++++++
 2 files changed, 14 insertions(+)
---
diff --git a/demos/gtk-demo/org.gtk.Demo.appdata.xml b/demos/gtk-demo/org.gtk.Demo.appdata.xml
index 7b142498bf..9f37d11a73 100644
--- a/demos/gtk-demo/org.gtk.Demo.appdata.xml
+++ b/demos/gtk-demo/org.gtk.Demo.appdata.xml
@@ -30,4 +30,11 @@
   <translation type="gettext">gtk-4.0</translation>
   <update_contact>matthias.clasen_at_gmail.com</update_contact>
   <developer_name>Matthias Clasen and others</developer_name>
+  <releases>
+    <release version="3.94.0" date="2018-06-25">
+      <description>
+        <p>A new developers snapshot towards GTK 4.0.</p>
+      </description>
+    </release>
+  </releases>
 </component>
diff --git a/demos/widget-factory/org.gtk.WidgetFactory.appdata.xml 
b/demos/widget-factory/org.gtk.WidgetFactory.appdata.xml
index a780508aa2..6e5a2d120b 100644
--- a/demos/widget-factory/org.gtk.WidgetFactory.appdata.xml
+++ b/demos/widget-factory/org.gtk.WidgetFactory.appdata.xml
@@ -31,4 +31,11 @@
   <translation type="gettext">gtk-4.0</translation>
   <update_contact>matthias.clasen_at_gmail.com</update_contact>
   <developer_name>Matthias Clasen and others</developer_name>
+  <releases>
+    <release version="3.94.0" date="2018-06-25">
+      <description>
+        <p>A new developers snapshot towards GTK 4.0.</p>
+      </description>
+    </release>
+  </releases>
 </component>