Add a couple of new KDE needles

To do with new desktop backgrounds or something.

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

needles/firefox/download_complete-blue-20180919.json

@@ -0,0 +1,16 @@
+{
+  "area": [
+    {
+      "type": "match",
+      "xpos": 895,
+      "ypos": 73,
+      "height": 19,
+      "width": 16
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "browser_download_complete",
+    "firefox_download_complete"
+  ]
+}

needles/kde/desktop_package_tool_update-kde-detected-20180919.json

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