[v8] Mark layout test for rebase on ES6 instanceof.
[v8] Mark layout test for rebase on ES6 instanceof.

The new ES6 instanceof semantics have by now shipped in V8 and layout
tests can be rebaselined. This one test in question can be handled
automatically.

R=hablich@chromium.org
BUG=chromium:597221,v8:4447

Review URL: https://codereview.chromium.org/1860483002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#384892}

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