bump to Gluon 2018.2, enable OSM integration

site.mk

@@ -15,6 +15,7 @@ GLUON_FEATURES := \
 	radv-filterd \
 	respondd \
 	web-wizard \
+	web-osm \
 	web-advanced \
 	web-private-wifi \
 	status-page

version.sh

@@ -3,10 +3,10 @@
 # $1 is used to determine whether we use an experimental, beta, or stable version
 
 # This is where we control which Gluon version to use.
-export GLUON_UPSTREAM_TAG="v2018.1.3"
+export GLUON_UPSTREAM_TAG="v2018.2"
 
 # This is where we control the version number of our firmware.
-CURRENT_VERSION="1.7.1"
+CURRENT_VERSION="1.7.2"
 CURRENT_BETA_SUFFIX="~rc1"
 CURRENT_EXPERIMENTAL_SUFFIX="~exp$(date '+%Y%m%d')"