statsd: Import package from laurentb overlay.

This package is not available in gentoo. It was pulled from an overlay on Layman
(http://gpo.zugaina.org/Overlays/laurentb/dev-python/statsd)

Upgraded dev-python/statsd to version 3.0.1 on amd64

BUG=chromium:432327
TEST=- 'sudo emerge statsd'
     - Spin up a python shell inside the chroot:
         import statsd
         statsd.StatsClient('localhost', 8125).incr('foo')

Change-Id: I6ad8f9279bb16ba7a0f95cb2a64a41a68bb8594b
Reviewed-on: https://chromium-review.googlesource.com/229704
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Prathmesh Prabhu <pprabhu@chromium.org>
Commit-Queue: Prathmesh Prabhu <pprabhu@chromium.org>
3 files changed