Save tcpdump logs for lo interface during login

This is to help debug network issues (perhaps captive portal) during login in the lab.

BUG=chromium-os:24338
TEST=None

Change-Id: I05ec1279ce4bc1a0f95db25fd619bd6f6cf5b4c6
Reviewed-on: https://gerrit.chromium.org/gerrit/13102
Reviewed-by: Stanley Wong <stanleyw@chromium.org>
Tested-by: Stanley Wong <stanleyw@chromium.org>
Commit-Ready: Nirnimesh <nirnimesh@chromium.org>
Tested-by: Nirnimesh <nirnimesh@chromium.org>
1 file changed