modules: update openwrt-routing packages

Updates batman-adv and alfred to 2017.2 and adds the batman-adv TT-sync
fix.

Fixes #1183

modules

@@ -12,7 +12,7 @@ PACKAGES_GLUON_REPO=https://github.com/freifunk-gluon/packages.git
 PACKAGES_GLUON_COMMIT=71823713c0e9451d1cd459cb10309f468188eb6e
 
 PACKAGES_ROUTING_REPO=https://github.com/openwrt-routing/packages.git
-PACKAGES_ROUTING_COMMIT=8d9d70510b2c86f7503962308846ec874f0eb39f
+PACKAGES_ROUTING_COMMIT=e656a6e0e69dd45b7caa24775bc86b6eb5dcfe7f
 
 PACKAGES_LUCI_REPO=https://github.com/openwrt/luci.git
 PACKAGES_LUCI_BRANCH=lede-17.01