Fix build issues after addition of OGR open_options support

plugins/input/ogr/CMakeLists.txt

@@ -4,6 +4,7 @@ add_plugin_target(input-ogr "ogr")
 target_sources(input-ogr ${_plugin_visibility}
     ogr_converter.cpp
     ogr_datasource.cpp
+    ogr_utils.cpp
     ogr_featureset.cpp
     ogr_index_featureset.cpp
 )

test/CMakeLists.txt

@@ -34,6 +34,7 @@ add_executable(mapnik-test-unit
     unit/datasource/geobuf.cpp
     unit/datasource/geojson.cpp
     unit/datasource/memory.cpp
+    ../plugins/input/ogr/ogr_utils.cpp
     unit/datasource/ogr.cpp
     unit/datasource/postgis.cpp
     unit/datasource/shapeindex.cpp