Redirect touch firmware update reports to '/run/touch-updater'

Use tmpfiles.d to create a '/run/touch-updater' directory and
redirect the touch firmware update reports to the file
'/run/touch-updater/firmware-versions'. This is to address
a concern about creating and havingto bind mount files directly.

BUG=b:173545945
TEST=Validate that directory is created and firmware update reports
     are written to '/run/touch-updater/firmware-version'.

Cq-Depend: chromium:2806668
Change-Id: I100ccbdfa75d2d250a0e78c23b0a411eddd2fc74
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/touch_updater/+/5018299
Tested-by: Henry Barnor <hbarnor@chromium.org>
Commit-Queue: Henry Barnor <hbarnor@chromium.org>
Reviewed-by: Kenneth Albanowski <kenalba@google.com>
Reviewed-by: Jingyuan Liang <jingyliang@chromium.org>
2 files changed