dnsmasq: patch to write dhcp options into the lease file

BUG=b:26814267
TEST=verified restart, reboot, and options can be read.

Change-Id: I361937da8c6292f3a6d1f641b857e905793a6c84
Reviewed-on: https://chromium-review.googlesource.com/324190
Commit-Ready: Christopher Book <cbook@chromium.org>
Tested-by: Christopher Book <cbook@chromium.org>
Reviewed-by: Zeping Qiu <zqiu@chromium.org>
2 files changed