Add a new KDE desktop update needle variant

Little black bits on the icon are in a different place now. Why,
I do not know.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

needles/kde/desktop_package_tool_update-kde-detected-20190821.json

@@ -0,0 +1,16 @@
+{
+  "area": [
+    {
+      "xpos": 753,
+      "width": 19,
+      "type": "match",
+      "ypos": 741,
+      "height": 18
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "DESKTOP-kde",
+    "desktop_package_tool_update"
+  ]
+}