cubicweb-postgis #3036192 provide sqlite serialization functions [validation pending]

When Geometry base type is used, sqlite crashes when it creates the test database because it's unable to serialize geometries.

To make geometry actually testable, it would probably require to modify logilab.database in order to be able to provide a SQL to Python deserializer, but the bare minimum would be not to crash when creating test database.

done in0.1.0
load left0.000
closed by<not specified>