generate_au_zip: Add puffin

Adds puffin binary to generate_au_zip.

BUG=chromium:768461
TEST=tryjob

Change-Id: Iadc11d7cdf262b28366552b8de60be58a2f9c06d
Reviewed-on: https://chromium-review.googlesource.com/682594
Commit-Ready: Amin Hassani <ahassani@chromium.org>
Tested-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Don Garrett <dgarrett@chromium.org>
1 file changed