mysql-test: sys_vars stub for a new xtradb config variable; tc_log_mmap test;

mysql-test/suite/sys_vars/r/innodb_buffer_pool_populate_basic.result

+XtraDB extension

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

+--echo XtraDB extension

storage/pbxt/mysql-test/main/r/rpl_mmap.result

+include/master-slave.inc
+[connection master]
+create table t1 (a int) engine=InnoDB;
+create table t2 (a int) engine=pbxt;
+begin;
+insert into t1 values (1);
+insert into t2 values (2);
+commit;
+select * from t1;
+a
+1
+select * from t2;
+a
+2
+drop table t1, t2;
+include/rpl_end.inc

storage/pbxt/mysql-test/main/t/rpl_mmap.test

+--source include/have_innodb.inc
+--source include/master-slave.inc
+
+create table t1 (a int) engine=InnoDB;
+create table t2 (a int) engine=pbxt;
+
+begin;
+insert into t1 values (1);
+insert into t2 values (2);
+commit;
+
+sync_slave_with_master;
+connection slave;
+
+select * from t1;
+select * from t2;
+
+connection master;
+drop table t1, t2;
+
+--source include/rpl_end.inc