Add variant 'getting started' needle for selinux alert

An selinux alert can hide the 'getting started' window title, so
let's have a variant needle which matches on the big 'Started'
in the window instead. We may as well have both for maximum
match potential.

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

needles/gnome/getting_started-largetext-20180907.json

@@ -0,0 +1,17 @@
+{
+  "properties": [],
+  "tags": [
+    "getting_started",
+    "LANGUAGE-english",
+    "LANGUAGE-arabic"
+  ],
+  "area": [
+    {
+      "width": 121,
+      "height": 30,
+      "type": "match",
+      "ypos": 123,
+      "xpos": 173
+    }
+  ]
+}