Add some more variant needles (passphrase entry, Firefox)

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

needles/console/boot_enter_passphrase-greywhite-20180507.json

@@ -0,0 +1,15 @@
+{
+  "properties": [],
+  "tags": [
+    "boot_enter_passphrase"
+  ],
+  "area": [
+    {
+      "ypos": 175,
+      "width": 185,
+      "type": "match",
+      "xpos": 0,
+      "height": 17
+    }
+  ]
+}

needles/firefox/download_complete-blue-20180507.json

@@ -0,0 +1,16 @@
+{
+  "tags": [
+    "browser_download_complete",
+    "firefox_download_complete"
+  ],
+  "area": [
+    {
+      "height": 19,
+      "xpos": 895,
+      "ypos": 73,
+      "width": 16,
+      "type": "match"
+    }
+  ],
+  "properties": []
+}