Version 4.2.77.20 (cherry-pick)

Merged 8ceb9035

Fix FreeBSD build.

BUG=v8:4079
LOG=N
NOTRY=true
NOPRESUBMIT=true
R=titzer@chromium.org

Review URL: https://codereview.chromium.org/1129843002

Cr-Commit-Position: refs/branch-heads/4.2@{#23}
Cr-Branched-From: 3dfd929e-refs/heads/4.2.77@{#2}
Cr-Branched-From: e0110920-refs/heads/master@{#26757}