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