Makes slave_type_conversions_basic to be skipped in embedded

run in PB2 as it ought to be. Otherwise test will fail because
variable is no recognized:

1193: Unknown system variable 'slave_type_conversions'

mysql-test/suite/sys_vars/t/slave_type_conversions_basic.test

 
+--source include/not_embedded.inc
+
 set @saved_slave_type_conversions = @@global.slave_type_conversions;
 
 SELECT @@global.slave_type_conversions;