create /var/lib/whitelist as a file will prevent UI startup.

- whitelist is expected to be a directory.
- system will failed to come up during while attempt to create a
  file under /var/lib/whitelist.

BUG=chromium:389247
TEST=None

Change-Id: Ie56ad3e22a3de2012828fe95a3311d17fd1bcefc
Reviewed-on: https://chromium-review.googlesource.com/227445
Tested-by: danny chan <dchan@chromium.org>
Reviewed-by: Yusuf Mohsinally <mohsinally@chromium.org>
Reviewed-by: danny chan <dchan@chromium.org>
Commit-Queue: danny chan <dchan@chromium.org>
1 file changed