Bug# 16718 partitioning support status variable has incorrect name

change status variable from have_partition_engine to have_partitioning.

mysql-test/include/have_partition.inc

 -- require r/have_partition.require
 disable_query_log;
-show variables like "have_partition_engine";
+show variables like "have_partitioning";
 enable_query_log;

mysql-test/r/have_partition.require

 Variable_name	Value
-have_partition_engine	YES
+have_partitioning	YES

sql/set_var.cc

@@ -631,7 +631,7 @@ sys_var_have_variable sys_have_innodb("have_innodb", &have_innodb);
 sys_var_have_variable sys_have_isam("have_isam", &have_isam);
 sys_var_have_variable sys_have_ndbcluster("have_ndbcluster", &have_ndbcluster);
 sys_var_have_variable sys_have_openssl("have_openssl", &have_openssl);
-sys_var_have_variable sys_have_partition_db("have_partition_engine",
+sys_var_have_variable sys_have_partition_db("have_partitioning",
                                             &have_partition_db);
 sys_var_have_variable sys_have_query_cache("have_query_cache",
                                            &have_query_cache);