update_engine: Split DBus client proxies to a library.
In order to allow other daemons call update_engine's DBus interface, we
split the generated interface to its own client library.
BUG=b:23084607
TEST=rm -rf /build/storm/var/cache/portage/chromeos-base/update_engine/out/Default/ ; emerge-link update_engine
Change-Id: Iac09b3269d9ffab599b27888b4a1a2824d262059
Reviewed-on: https://chromium-review.googlesource.com/294064
Commit-Queue: Alex Deymo <deymo@chromium.org>
Trybot-Ready: Alex Deymo <deymo@chromium.org>
Tested-by: Alex Deymo <deymo@chromium.org>
Reviewed-by: Alex Deymo <deymo@chromium.org>
5 files changed
