dev-python: Pull in new packages needed by pyshark for capture analysis.

Adding new python package dependencies for Pyshark packet capture
analysis wrapper.
This CL imports futures, logbook, lxml, trollius, python-futures from
upstream Gentoo and modifies the ebuild to use KEYWORDS="*".

BUG=chromium:470708
TEST=`sudo emerge dev-python/futures dev-python/logbook dev-python/lxml
dev-python/trollius virtual/python-futures`

Change-Id: Id149bf8c17a01d0b882963adbf5fa5d83f1a5507
Reviewed-on: https://chromium-review.googlesource.com/262456
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Roshan Pius <rpius@chromium.org>
Tested-by: Roshan Pius <rpius@chromium.org>
15 files changed