Bug 1465815 [wpt PR 11276] - Update wpt metadata, a=testonly

wpt-pr: 11276 wpt-type: metadata
2018-06-01 15:09:30 +00:00 · 2018-06-01 15:09:30 +00:00 · 328e0196f1
--- a/testing/web-platform/meta/web-animations/animation-model/animation-types/accumulation-per-property.html.ini
+++ b/testing/web-platform/meta/web-animations/animation-model/animation-types/accumulation-per-property.html.ini
@ -1 +1,2 @@
 prefs: [layout.css.font-variations.enabled:true, layout.css.overflow-clip-box.enabled:true, layout.css.individual-transform.enabled:true]
+[accumulation-per-property.html]
--- a/testing/web-platform/meta/web-animations/animation-model/animation-types/addition-per-property.html.ini
+++ b/testing/web-platform/meta/web-animations/animation-model/animation-types/addition-per-property.html.ini
@ -1 +1,2 @@
 prefs: [layout.css.font-variations.enabled:true, layout.css.overflow-clip-box.enabled:true, layout.css.individual-transform.enabled:true]
+[addition-per-property.html]