update_engine: Extend rollback documentation with powerwash behavior.
The powerwash flag is enabled by default when doing a rollback. This
patch mentions that in the -rollback update_engine_client help.
BUG=None
TEST=update_engine_client --help
Change-Id: Ib9dbd49de02663ecf8c0dd07d635e49fd19644fe
Reviewed-on: https://chromium-review.googlesource.com/243340
Commit-Queue: Alex Deymo <deymo@chromium.org>
Trybot-Ready: Alex Deymo <deymo@chromium.org>
Tested-by: Alex Deymo <deymo@chromium.org>
Reviewed-by: Chris Sosa <sosa@chromium.org>
1 file changed