rtslib-fb: import latest stable from upstream

Import dev-python/rtslib-fb version 2.1.57 on amd64 with the command:
    cros_portage_upgrade --host --force --upgrade rtslib-fb

This package will be needed by the devserver to manage the LIO kernel
target.

BUG=chromium:570766
TEST=emerge rtslib-fb

Change-Id: Id29f0e022577dfea3a626ed15ee7c1bda3b8b867
Reviewed-on: https://chromium-review.googlesource.com/343621
Commit-Ready: Victor Dodon <printesoi@chromium.org>
Tested-by: Victor Dodon <printesoi@chromium.org>
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
4 files changed