Bug 2025779 - Update test262-update.py; r=arai

Differential Revision: https://phabricator.services.mozilla.com/D295350

Author: dminor

js/src/tests/test262-update.py

@@ -31,6 +31,7 @@
     "Atomics.pause": "!this.hasOwnProperty('Atomics')||!Atomics.pause",  # Bug 1918717
     "Error.isError": "!Error.isError",  # Bug 1923733
     "iterator-sequencing": "!Iterator.concat",  # Bug 1923732
+    "iterator-includes": "!Iterator.prototype.includes",  # Bug 2025779
     "immutable-arraybuffer": "!ArrayBuffer.prototype.sliceToImmutable",  # Bug 1952253
     "await-dictionary": "!Promise.allKeyed",
     "source-phase-imports": "!(this.hasOwnProperty('getBuildConfiguration')&&getBuildConfiguration('source-phase-imports'))",
@@ -43,6 +44,7 @@
     "symbols-as-weakmap-keys": "--enable-symbols-as-weakmap-keys",
     "explicit-resource-management": "--enable-explicit-resource-management",
     "iterator-sequencing": "--enable-iterator-sequencing",
+    "iterator-includes": "--enable-iterator-includes",
     "Atomics.waitAsync": "--setpref=atomics_wait_async",
     "immutable-arraybuffer": "--enable-arraybuffer-immutable",
     "import-bytes": "--enable-import-bytes",