Tweak text_console_login match area

On Rawhide Cloud_Base boots, there's some SSH key and network
information printed above the 'login:' prompt, so we can't
expect empty space there. Let's just hope not looking for the
empty space doesn't break anything else.

https://openqa.fedoraproject.org/tests/489003#step/_console_wait_login/7

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

needles/console/text_console_login.json

@@ -1,11 +1,11 @@
 {
     "area": [
         {
-            "height": 30,
+            "height": 15,
             "type": "match",
-            "width": 56,
+            "width": 61,
             "xpos": 72,
-            "ypos": 49
+            "ypos": 64
         }
     ],
     "properties": [],
@@ -15,4 +15,4 @@
         "ENV-DISTRI-fedora",
         "ENV-FLAVOR-develop"
     ]
-}
+}