[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

Committed: https://crrev.com/3e966abc1ff06d8b707658416343c11b060ff221
Cr-Commit-Position: refs/heads/master@{#29513}

[Michael Achenbach, 2015-07-07 11:38:49]

machenbach@chromium.org changed reviewers:
+ jkummerow@chromium.org, tandrii@chromium.org

[Michael Achenbach, 2015-07-07 11:40:21]

PTAL - last attempt (tested on the bot) - if that's not ok then test262 will
stay off on windows...

[Jakob Kummerow, 2015-07-07 11:41:02]

lgtm

[Michael Achenbach, 2015-07-07 11:41:52]

The CQ bit was checked by machenbach@chromium.org

[commit-bot: I haz the power, 2015-07-07 11:42:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1220333004/1

[commit-bot: I haz the power, 2015-07-07 11:42:16]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-07 11:42:38]

Patchset 1 (id:??) landed as
https://crrev.com/3e966abc1ff06d8b707658416343c11b060ff221
Cr-Commit-Position: refs/heads/master@{#29513}

[tandrii(chromium), 2015-07-10 21:12:01]

lgtm