A patch to always select MyISAM as the temporary dedupe table storage engine for performance reasons; regardless of the MySQL configuration.

Adds MyISAM storage engine specification to the queries that create temporary tables are part of the dedupe process. Without this specification a civicrm install using default_storage_engine = InnoDB dedupes much slower because of how much slower InnoDB temporary tables are than MyISAM tables (especially with the file_per_table option).