Update test262.

Rolling v8/test/test262/data: https://chromium.googlesource.com/external/github.com/tc39/test262/+log/d9d9839..0475c12

TBR=adamk@chromium.org,gsathya@chromium.org

Change-Id: I3d996306614cbf80a24c9dfc4f320ad551fd0b84
Reviewed-on: https://chromium-review.googlesource.com/c/1326365Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#57356}

DEPS

@@ -57,7 +57,7 @@ deps = {
   'v8/test/mozilla/data':
     Var('chromium_url') + '/v8/deps/third_party/mozilla-tests.git' + '@' + 'f6c578a10ea707b1a8ab0b88943fe5115ce2b9be',
   'v8/test/test262/data':
-    Var('chromium_url') + '/external/github.com/tc39/test262.git' + '@' + 'd9d9839c95739a458cf595b0b04657c16c3af2ef',
+    Var('chromium_url') + '/external/github.com/tc39/test262.git' + '@' + '0475c127c4c0d4c8ab8c843dcb237f330507c072',
   'v8/test/test262/harness':
     Var('chromium_url') + '/external/github.com/test262-utils/test262-harness-py.git' + '@' + '0f2acdd882c84cff43b9d60df7574a1901e2cdcd',
   'v8/third_party/qemu-linux-x64': {