zephyr: Comply with the security mandate to have pip hash specified.

BUG=b:335564773
TEST=build zephyr.txt

Change-Id: Iaf33beb873bd71eb28ecdc3dcad23db165bd8034
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dolos/+/5750217
Auto-Submit: Keith Haddow <haddowk@chromium.org>
Tested-by: Keith Haddow <haddowk@chromium.org>
Commit-Queue: Keith Haddow <haddowk@chromium.org>
Reviewed-by: Ɓukasz Hajec <hajec@google.com>
3 files changed