Make Certificate Transparency scripts Python 3 compatible

The scripts still work with Python 2.
There are no intended behaviour changes.

Bug: 941669
Change-Id: If877c37ffe36d24a49bbe74e76fc7e9369523a75
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1526053
Reviewed-by: Ryan Sleevi <rsleevi@chromium.org>
Commit-Queue: Raul Tambre <raul@tambre.ee>
Cr-Commit-Position: refs/heads/master@{#642689}
2 files changed