cipd.bat is called from bootstrap/win/win_tools.bat. ERRORLEVEL in
win_tools.bat script should not mean return code of cipd.bat.

Bug: none
Change-Id: Ia425d5054fa9c1e1f84b4a10decc265669911646
Reviewed-on: https://chromium-review.googlesource.com/987954Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Commit-Queue: Robbie Iannucci <iannucci@chromium.org>