FileGDB: add a CREATE_MULTIPATCH creation option; OpenFileGDB: handle SHPT_MULTIPATCH and SHPT_MULTIPATCHM and test multipatch support

git-svn-id: https://svn.osgeo.org/gdal/trunk@26877 f0d54148-0727-0410-94bb-9a71ac55c965
Merge branch 'trunk' into trunk_with_coverage