modules: update OpenWrt routing

101632e Merge pull request #658 from ecsv/batadv-for-19.07
a995b62 batman-adv: Merge bugfixes from 2021.1
118536c bird2: Makefile polishing
9d6ef13 bird2: update to version 2.0.8

Signed-off-by: David Bauer <mail@david-bauer.net>