Fix to WKT files

Use GDAL 1.10. 1.11 has bug #10983

See:
http://osgeo-org.1560.x6.nabble.com/OGR-v1-11-CSV-GEOM-AS-WKT-truncated-to-8000-characters-works-normally-in-v1-10-1-td5143804.html