libbrillo: Add new install attributes library.
Based on that new library, waive signature verification in libpolicy
when verified install attributes device mode is enterprise_ad.
BUG=chromium:658713
TEST=unittests
CQ-DEPEND=CL:400820
Change-Id: I650913c6faf48f215cc28b147175d37f0651cb1a
Reviewed-on: https://chromium-review.googlesource.com/402148
Commit-Ready: Roman Sorokin <rsorokin@chromium.org>
Tested-by: Thiemo Nagel <tnagel@chromium.org>
Tested-by: Roman Sorokin <rsorokin@chromium.org>
Reviewed-by: Mattias Nissler <mnissler@chromium.org>
Reviewed-by: Roman Sorokin <rsorokin@chromium.org>
16 files changed
