Bug 1587896 [wpt PR 19630] - Update wpt metadata, a=testonly

wpt-pr: 19630 wpt-type: metadata
2019-10-10 23:02:35 +00:00 · 2019-10-10 23:02:35 +00:00 · 26f4fa8efa
--- a/testing/web-platform/meta/portals/portals-api.html.ini
+++ b/testing/web-platform/meta/portals/portals-api.html.ini
@ -0,0 +1,4 @@
+[portals-api.html]
+  [portal element exists]
+    expected: FAIL
+