Bug 1603802 [wpt PR 20771] - Update wpt metadata, a=testonly

wpt-pr: 20771
wpt-type: metadata

testing/web-platform/meta/html/infrastructure/safe-passing-of-structured-data/structured-cloning-error-extra.html.ini

@@ -0,0 +1,8 @@
+[structured-cloning-error-extra.html]
+  expected: ERROR
+  [Throwing name getter fails serialization]
+    expected: FAIL
+
+  [Errors sent across realms should preserve their type]
+    expected: TIMEOUT
+

testing/web-platform/meta/html/infrastructure/safe-passing-of-structured-data/structuredclone_0.html.ini

@@ -41,3 +41,6 @@
   [SyntaxError objects can be cloned]
     expected: FAIL
 
+  [URIError objects from other realms are treated as URIError]
+    expected: FAIL
+