update fs_xfs and fs_ext4_preselected needles

these rarely get used any more. they're only used when we're
running the filesystem tests on a non-Server image, where the
default fs is ext4 not xfs. With the old nightly process, where
we only got a generic boot.iso, we used them all the time, but
now we get product-ized nightlies, we rarely do. But I did hit
them today running the universal tests with a generic boot.iso
I hand-built to test an anaconda update, so in case we need to
do that kind of thing again in future, we may as well update
the needles.

needles/anaconda/partitioning/fs_ext4_preselected-20160908.json

@@ -0,0 +1,17 @@
+{
+  "area": [
+    {
+      "ypos": 348,
+      "xpos": 380,
+      "height": 56,
+      "type": "match",
+      "width": 73
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "anaconda_part_fs",
+    "anaconda_part_fs_ext4_selected",
+    "ENV-DISTRI-fedora"
+  ]
+}

needles/anaconda/partitioning/fs_xfs-20160908.json

@@ -0,0 +1,16 @@
+{
+  "properties": [],
+  "area": [
+    {
+      "xpos": 385,
+      "height": 16,
+      "ypos": 464,
+      "width": 21,
+      "type": "match"
+    }
+  ],
+  "tags": [
+    "ENV-DISTRI-fedora",
+    "anaconda_part_fs_xfs"
+  ]
+}