openwrt: Add OEM to OpenWrt UU6P script

Adds a script to automate process for installing OpenWrt for the
first time from an OEM UU6P device. See comments in script for
specifics.

BUG=b:329520091
TEST=successfully ran script to install openwrt on 3 different
OEM UU6Ps
TEST=successfully validated that script fails when trying to run
it for a device already with OpenWrt

Change-Id: Ide6f7a140b6a7f3e6ef34288ba1dd66eac41ae54
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/5377038
Tested-by: Jared Bennett <jaredbennett@google.com>
Reviewed-by: Jason Stanko <jstanko@google.com>
Commit-Queue: Jared Bennett <jaredbennett@google.com>
1 file changed