Add the export functions definition file for libmysql.dll.

When should add a function with STDCALL defined should be
add to this file, in this way the functions is exported for
the client application on Win32.

libmysql/libmysql.def

+LIBRARY		LIBMYSQL
+DESCRIPTION	'MySQL 4.0 Client Library'
+VERSION		4.0
+EXPORTS
+
+    mysql_num_rows
+	mysql_num_fields
+	mysql_eof
+	mysql_fetch_field_direct
+	mysql_fetch_fields
+	mysql_row_tell
+	mysql_field_tell
+	mysql_field_count
+	mysql_affected_rows
+	mysql_insert_id
+	mysql_errno
+	mysql_error
+	mysql_info
+	mysql_thread_id
+	mysql_character_set_name
+	mysql_init
+	mysql_ssl_set
+	mysql_ssl_clear
+	mysql_change_user
+	mysql_real_connect
+	mysql_close
+	mysql_select_db
+	mysql_query
+	mysql_send_query
+	mysql_read_query_result
+	mysql_real_query
+	mysql_master_query
+	mysql_master_send_query
+	mysql_slave_query
+	mysql_slave_send_query
+	mysql_enable_rpl_parse
+	mysql_disable_rpl_parse
+	mysql_rpl_parse_enabled
+	mysql_enable_reads_from_master
+	mysql_disable_reads_from_master
+	mysql_reads_from_master_enabled
+	mysql_rpl_query_type
+	mysql_rpl_probe
+	mysql_set_master
+	mysql_add_slave
+	mysql_shutdown
+	mysql_dump_debug_info
+	mysql_refresh
+	mysql_kill
+	mysql_ping
+	mysql_stat
+	mysql_get_server_info
+	mysql_get_client_info
+	mysql_get_host_info
+	mysql_get_proto_info
+	mysql_list_dbs
+	mysql_list_tables
+	mysql_list_fields
+	mysql_list_processes
+	mysql_store_result
+	mysql_use_result
+	mysql_options
+	mysql_free_result
+	mysql_data_seek
+	mysql_row_seek
+	mysql_field_seek
+	mysql_fetch_row
+	mysql_fetch_lengths
+	mysql_fetch_field
+	mysql_escape_string
+	mysql_real_escape_string
+	mysql_debug
+	mysql_odbc_escape_string
+	myodbc_remove_escape
+	mysql_thread_safe
+	mysql_manager_init
+	mysql_manager_connect
+	mysql_manager_close
+	mysql_manager_command
+	mysql_manager_fetch_line
+	mysql_connect
+	mysql_create_db
+	mysql_drop_db
+