kickstart-tests: add a variant hostname login needle

text_console_login matches on the hostname, which the kickstart
'hostname' test changes (that's the point of the test). So add
a variant needle for that case. If we ever make a 'native'
openQA test that changes the hostname we should make sure to
use 'testhostname' so this needle is shared.

needles/text_console_login-testhostname.json

@@ -0,0 +1,16 @@
+{
+  "area": [
+    {
+      "type": "match",
+      "xpos": 1,
+      "ypos": 49,
+      "height": 30,
+      "width": 151
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "text_console_login",
+    "ENV-DISTRI-fedora"
+  ]
+}