Added DOCKER=1 for otbr bootstrap to skip installing resolvconf.
Fix the expected submodule path 'openthread' not to be a symbolic link issue caused by make-firmware for nrf52840 creates a symbolic link for openthread submodule. This is not accepted by the git_archive_all tool.
It also adds CI for building 1.3.1 reference release.
This PR fixes 2 issues:
expected submodule path 'openthread' not to be a symbolic link
issue caused by make-firmware for nrf52840 creates a symbolic link for openthread submodule. This is not accepted by the git_archive_all tool.It also adds CI for building 1.3.1 reference release.