Make simdjs tests redownload on a revision change.
Make simdjs tests redownload on a revision change.

LOG=N
BUG=None
TEST=manual,local
R=bbudge@chromium.org,machenbach@chromium.org

Review URL: https://codereview.chromium.org/1240453003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#29780}

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