Bug 1512562 [wpt PR 14407] - Update wpt metadata, a=testonly

wpt-pr: 14407
wpt-type: metadata

testing/web-platform/meta/scroll-animations/current-time-nan.html.ini

@@ -0,0 +1,13 @@
+[current-time-nan.html]
+  [currentTime should be null for a display: none scrollSource]
+    expected: FAIL
+
+  [currentTime should be null for a display: inline scrollSource]
+    expected: FAIL
+
+  [currentTime should be null when the scrollSource is not a scroller]
+    expected: FAIL
+
+  [currentTime should be null for an unattached scrollSource]
+    expected: FAIL
+