[turbofan] Better fix for Win64 after r28066.
[turbofan] Better fix for Win64 after r28066.

TBR=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/1107253003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#28092}

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh