[gnome-builder/gnome-builder-3-28] add missing appdata

[Christian Hergert <chergert src gnome org>]

commit dbb02428bc250064dbbaac021ffa8902904b9b9f
Author: Christian Hergert <chergert redhat com>
Date:   Tue Jun 19 15:14:36 2018 -0700

    add missing appdata

 data/org.gnome.Builder.appdata.xml.in | 13 +++++++++++++
 1 file changed, 13 insertions(+)
---
diff --git a/data/org.gnome.Builder.appdata.xml.in b/data/org.gnome.Builder.appdata.xml.in
index ebee055d2..92b8a23f0 100644
--- a/data/org.gnome.Builder.appdata.xml.in
+++ b/data/org.gnome.Builder.appdata.xml.in
@@ -81,6 +81,19 @@
   <translation type="gettext">gnome-builder</translation>
 
   <releases>
+    <release version="3.28.3" date="2018-06-19">
+      <description>
+        <p>
+          Builder 3.28.3 contains a number of critical bugfixes and translation updates.
+        </p>
+        <ul>
+          <li>Fixes for a number of crashers and potential data loss.</li>
+          <li>The editor more reliably restores cursor position.</li>
+          <li>The todo plugin more aggresively ignores some common build tooling directories.</li>
+        </ul>
+      </description>
+    </release>
+
     <release version="3.28.2" date="2018-05-28">
       <description>
         <p>