Fixed bug in wifi code.

arcroft/build-arcroft.sh

@@ -148,7 +148,7 @@ wget "${url[$imageVersion]}" -O- | bsdtar -xpf - -C /mnt
 if [[ -n "${imageWifi}" ]]; then
     mkdir -p "/mnt/etc/netctl"
     cp -v "${imageWifi}" "/mnt/etc/netctl/mycroft"
-    sed -i "s/Interface=.*/Interface=wlan0/" "${imageWifi}" "/mnt/etc/netctl/mycroft"
+    sed -i "s/Interface=.*/Interface=wlan0/" "/mnt/etc/netctl/mycroft"
 fi
 # Create Mycroft service file
 cat << 'EOF' > /mnt/etc/systemd/system/mycroft.service