Add F35 'day' background needle

There's also a 'night' and two transitions, so we'll have to
catch those as they show up.

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

needles/background/35_background-day-20210827.json

@@ -0,0 +1,15 @@
+{
+  "area": [
+    {
+      "xpos": 796,
+      "ypos": 332,
+      "width": 156,
+      "height": 168,
+      "type": "match"
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "35_background"
+  ]
+}