Uprev minizip to 2.8.1

BUG=906333,906354,906350

Change-Id: I5c383697a8a168865263b79bc8c4e264380d5c66
Reviewed-on: https://chromium-review.googlesource.com/c/1373249
Reviewed-by: Noel Gordon <noel@chromium.org>
Commit-Queue: Anand Mistry <amistry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#617048}
4 files changed