metrics_daemon: store persistent counters in /var/lib, not /var/log.

BUG=chromium:356781
TEST=manual

Change-Id: I7d36876347bdbbe329e24adf3345c2ade97be5fe
Reviewed-on: https://chromium-review.googlesource.com/195310
Reviewed-by: Luigi Semenzato <semenzato@chromium.org>
Commit-Queue: Luigi Semenzato <semenzato@chromium.org>
Tested-by: Luigi Semenzato <semenzato@chromium.org>
2 files changed