Make generic topbar needle narrower

We did this for the orange (Server) one already, but not the
blue generic one.

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

needles/anaconda/identification/topbar_generic-20190628.json

@@ -1,15 +1,15 @@
 {
+  "area": [
+    {
+      "type": "match",
+      "height": 34,
+      "ypos": 28,
+      "xpos": 179,
+      "width": 495
+    }
+  ],
   "properties": [],
   "tags": [
     "topbar_generic"
-  ],
-  "area": [
-    {
-      "xpos": 93,
-      "ypos": 49,
-      "width": 643,
-      "height": 34,
-      "type": "match"
-    }
   ]
 }