Enhance the servod upstart job to accept a BOARD parameter.

This change allows commands like 'start servod BOARD=link' to work.
Starting servod this way also permanently configures the unit to use
the new board for future restarts (e.g. after a reboot).

TEST=from a fresh install, run 'start servod BOARD=link', see it work.

Change-Id: I4112f348bf4cbd9d5f545dcbc858e0e823f1a754
Reviewed-on: https://chromium-review.googlesource.com/186419
Reviewed-by: Dan Shi <dshi@chromium.org>
Commit-Queue: Richard Barnette <jrbarnette@chromium.org>
Tested-by: Richard Barnette <jrbarnette@chromium.org>
1 file changed