OGR-GML: add GFS files to support Czech RUIAN VFR format

git-svn-id: https://svn.osgeo.org/gdal/trunk@27198 f0d54148-0727-0410-94bb-9a71ac55c965
OGR-autotest: add test for Czech RUIAN VFR files


git-svn-id: https://svn.osgeo.org/gdal/trunk@27199 f0d54148-0727-0410-94bb-9a71ac55c965
OGR-GML: note RUIAN support (VFR) in the manual


git-svn-id: https://svn.osgeo.org/gdal/trunk@27200 f0d54148-0727-0410-94bb-9a71ac55c965