Add variant device_sda_selected needle for #1530410

Rawhide has a bit of a problem where its 'description' of an
iSCSI disk is so long that the other columns that should appear
in the CONFIGURE MOUNT POINT dialog don't. This means our
device_sda_selected needle doesn't match, because the column
where 'sda' should appear isn't visible.

So add a soft-fail needle to cover this case; we know what the
description for the disk that's 'sda' in this case looks like,
so match on that.

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

needles/anaconda/partitioning/device_sda_selected-bz1530410-20180104.json

@@ -0,0 +1,18 @@
+{
+  "tags": [
+    "anaconda_part_device_sda",
+    "anaconda_part_device_sda_selected"
+  ],
+  "properties": [
+    "workaround"
+  ],
+  "area": [
+    {
+      "width": 104,
+      "type": "match",
+      "ypos": 342,
+      "height": 13,
+      "xpos": 251
+    }
+  ]
+}