Bug 1564665 [wpt PR 17546] - Update wpt metadata, a=testonly

wpt-pr: 17546 wpt-type: metadata
2019-07-18 19:01:37 +00:00 · 2019-07-18 19:01:37 +00:00 · 51eaa7c969
--- a/testing/web-platform/meta/std-toast/attributes.html.ini
+++ b/testing/web-platform/meta/std-toast/attributes.html.ini
@ -0,0 +1,2 @@
+[attributes.html]
+  expected: TIMEOUT