Add arrow to sprite

LICENSE.md

@@ -28,6 +28,10 @@ For printed and static maps a similar attribution should be made in a textual de
 
 OSM Liberty is using the [Maki POI icon set](https://github.com/mapbox/maki/blob/master/LICENSE.txt) which is licensed under CC0 1.0 Universal.
 
+The right arrow was derived from [Wikipedia][wiki_arrow] which is in the public domain.
+
+[wiki_arrow]: https://commons.wikimedia.org/wiki/File:Arrowright.svg
+
 ## Fonts
 
 OSM Liberty is using the Roboto font family (Copyright 2011 Google).

svgs/svgs_not_in_iconset/arrow.svg

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" width="20" height="7" viewBox="0 0 80 29">
+    <path d="m61,15H11v-1h49m0-2 9,2.5-9,2.5"/>
+</svg>