Fix for mariadb_convert_string function. Fix of the the charset name in case of Utf16 - iconv digests UTF-16, and not UTF16, as destination charset. Also we always use either BE or LE for utf16, to avoid BOM in the result string.
Fix for mariadb_convert_string function. Fix of the the charset name in case of Utf16 - iconv digests UTF-16, and not UTF16, as destination charset. Also we always use either BE or LE for utf16, to avoid BOM in the result string.

ericherman/mariadb-connector-c,ericherman/mariadb-connector-c,ottok/mariadb-connector-c,MariaDB/mariadb-connector-c,ericherman/mariadb-connector-c,ottok/mariadb-connector-c,MariaDB/mariadb-connector-c,MariaDB/mariadb-connector-c,ottok/mariadb-connector-c