Add 'python swarming_bot.zip server'.
Add 'python swarming_bot.zip server'.

This is for zip management. Since swarming always print junk on startup, one has
to use:
    python swarming_bot.zip server 2> /dev/null

R=vadimsh@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1845343004

luci/luci-py,luci/luci-py,luci/luci-py,luci/luci-py