Bump ot-br-posix, openthread and ot-nrf528xx, including the fix for mdns build error - #120

Bump ot-br-posix, openthread and ot-nrf528xx, including the fix for mdns build error#120

jwhui merged 2 commits into

openthread:mainopenthread/ot-reference-release:mainfrom

yangsong-cnyn:remove_nmyangsong-cnyn/ot-reference-release:remove_nmCopy head branch name to clipboard