modules: update routing

ea345d1 Merge pull request #442 from ecsv/batadv-18.06
0231308 batman-adv: Merge bugfixes from 2019.0

Compile-tested: ar71xx-{tiny,generic}, ramips-mt7621, x86-64
Runtime-tested: ar71xx-generic (TP-Link TL-WR1043NDv2)