test: mark expected failures for webcryptoapi wpt tests

Author: Nahee-Park

test/wpt/status/WebCryptoAPI.json

@@ -2,7 +2,26 @@
   "algorithm-discards-context.https.window.js": {
     "skip": "Not relevant in Node.js context"
   },
+  "getRandomValues.any.js": {
+    "fail": {
+      "expected": [
+        "Float16 arrays"
+      ]
+    }
+  },
   "historical.any.js": {
     "skip": "Not relevant in Node.js context"
+  },
+  "sign_verify/eddsa.https.any.js": {
+    "fail": {
+      "expected": [
+        "Ed25519 Verification checks with small-order key of order - Test 0",
+        "Ed25519 Verification checks with small-order key of order - Test 1",
+        "Ed25519 Verification checks with small-order key of order - Test 2",
+        "Ed25519 Verification checks with small-order key of order - Test 11",
+        "Ed25519 Verification checks with small-order key of order - Test 12",
+        "Ed25519 Verification checks with small-order key of order - Test 13"
+      ]
+    }
   }
 }