modules: update Gluon packages

c2fedc5 libpacketmark: fix call of initialization function
1a8fd4b respondd-module-airtime: Give more helpful error messages

Fixes #1245

modules

@@ -9,7 +9,8 @@ PACKAGES_OPENWRT_BRANCH=lede-17.01
 PACKAGES_OPENWRT_COMMIT=8844d7e2d4f717898c55c6345ad3b43fca52c440
 
 PACKAGES_GLUON_REPO=https://github.com/freifunk-gluon/packages.git
-PACKAGES_GLUON_COMMIT=71823713c0e9451d1cd459cb10309f468188eb6e
+PACKAGES_GLUON_BRANCH=v2017.1.x
+PACKAGES_GLUON_COMMIT=c2fedc5d8e1166a6a7628fb4345195ff8771fec6
 
 PACKAGES_ROUTING_REPO=https://github.com/openwrt-routing/packages.git
 PACKAGES_ROUTING_COMMIT=e656a6e0e69dd45b7caa24775bc86b6eb5dcfe7f