Render the round_row roof shape

[Linkid]

Roofs with the roof:shape=round_row are not rendered. This shape is a set of repeated round shapes.

Here are some refs:

• taginfo: https://taginfo.openstreetmap.org/tags/roof:shape=round_row
• OSM 4D, subtype 7.4 (source of images): https://wiki.openstreetmap.org/wiki/OSM-4D/Roof_table#Subtype_7