Rolling v8/tools/swarming_client to 05e17879accce360bee999cd9ec891d761056bc2

TBR=machenbach@chromium.org,vogelheim@chromium.org,hablich@chromium.org

Review URL: https://codereview.chromium.org/1460103003

Cr-Commit-Position: refs/heads/master@{#32130}