A machine load is an effectful operation, but we didn't include
it in the effect chain.

Bug: v8:6929
Change-Id: I08a09c71dafd9dd7e5e40440a24751f2c5bcfae9
Reviewed-on: https://chromium-review.googlesource.com/718456
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48548}