Add variant login_permission_denied needle

In some recent tests the text is rendered slightly differently
for some reason. Not sure why, but I don't see a problem with
just adding a variant needle.

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

needles/console/login_permission_denied-20200611.json

@@ -0,0 +1,16 @@
+{
+  "area": [
+    {
+      "height": 13,
+      "type": "match",
+      "ypos": 144,
+      "width": 136,
+      "xpos": 0
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "login_permission_denied",
+    "ENV-DISTRI-fedora"
+  ]
+}