Update WPT for "Change default allowlist to 'all' #156"

The Gamepad API spec is updated to change the default allowlist
for the "gamepad" permissions policy to '*' (all) instead of 'self'.

w3c/gamepad#156

Change-Id: I087b3f77eebb385d2e2b80c0a19f5f3afedda30e

gamepad/gamepad-default-feature-policy.https.sub.html

@@ -37,8 +37,8 @@
       "getGamepads()",
       t,
       cross_origin_src,
-      expect_feature_unavailable_default
+      expect_feature_available_default
     );
-  }, header + " disallows cross-origin by default.");
+  }, header + " allows cross-origin by default.");
   </script>
-</body>
+</body>