Add support for Falcon, so that partitioning can be tested.

sql/handler.h

@@ -259,6 +259,7 @@ enum legacy_db_type
   DB_TYPE_PBXT,
   DB_TYPE_TABLE_FUNCTION,
   DB_TYPE_MEMCACHE,
+  DB_TYPE_FALCON,
   DB_TYPE_FIRST_DYNAMIC=42,
   DB_TYPE_DEFAULT=127 // Must be last
 };