Add alternative vdb selected needle for new blue checkboxes

This checkbox sometimes renders slightly differently, especially
on non-x86_64. We're not really sure why, but we just add more
needles to handle it.

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

needles/anaconda/partitioning/blivet/anaconda_blivet_vdb_selected-bluebox-alt-20190913.json

@@ -0,0 +1,15 @@
+{
+  "area": [
+    {
+      "height": 12,
+      "type": "match",
+      "ypos": 168,
+      "width": 51,
+      "xpos": 354
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "anaconda_blivet_vdb_selected"
+  ]
+}