COSQLiteStore: Fix -revisionInfoWithResultSet which was not using the right date function, leading to corrupted dates being read back

git-svn-id: svn://svn.gna.org/svn/etoile/trunk/Etoile/Frameworks/CoreObject@9849 7b3f36aa-e6db-49c1-8b4c-66eac1997e64