[test] Turn off certificate verification when downloading test data on windows.
[test] Turn off certificate verification when downloading test data on windows.

BUG=v8:4254
LOG=n
NOTRY=true
NOPRESUBMIT=true
NOTREECHECKS=true
TBR=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/1220333004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#29513}

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