Add workstation_selected-bgo771127 needle not black button

related to known bug
https://bugzilla.gnome.org/show_bug.cgi?id=771127

like other needles with same bgo#771127 reference
do not set it as Workaround needle.

Signed-off-by: Michel Normand <normand@linux.vnet.ibm.com>

needles/anaconda/package_selection/workstation_selected-bgo771127.json

@@ -0,0 +1,15 @@
+{
+  "tags": [
+    "anaconda_workstation_selected"
+  ],
+  "properties": [],
+  "area": [
+    {
+      "height": 13,
+      "width": 145,
+      "ypos": 254,
+      "xpos": 28,
+      "type": "match"
+    }
+  ]
+}