cipd: Report progress when zipping large directories.
cipd: Report progress when zipping large directories.

R=nodir@chromium.org
BUG=

Review URL: https://codereview.chromium.org/989693002

nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra