Fix test to make it pass with mingw

git-svn-id: https://svn.osgeo.org/gdal/trunk@27981 f0d54148-0727-0410-94bb-9a71ac55c965
Shape: add SPATIAL_INDEX layer creation option (#5562)

git-svn-id: https://svn.osgeo.org/gdal/trunk@27982 f0d54148-0727-0410-94bb-9a71ac55c965
Merge branch 'trunk' into trunk_vc12