Bug 1566128 - Add bug component for screen-capture wpt; r=jib

Differential Revision: https://phabricator.services.mozilla.com/D38103

--HG--
extra : moz-landing-system : lando

testing/web-platform/moz.build

@@ -476,6 +476,9 @@ with Files("tests/resource-timing/**"):
 with Files("tests/resources/**"):
     BUG_COMPONENT = ("Testing", "web-platform-tests")
 
+with Files("tests/screen-capture/**"):
+    BUG_COMPONENT = ("Core", "WebRTC: Audio/Video")
+
 with Files("tests/screen-orientation/**"):
     BUG_COMPONENT = ("Core", "DOM: Core & HTML")