MDEV-19525 fix the test for embedded

followup for 58cd2a8d

mysql-test/suite/versioning/t/debug.test

 --source include/have_debug.inc
 
+--let $datadir=`select @@datadir`
+
 create table t1 (a int);
 show create table t1;
 
@@ -38,9 +40,10 @@ drop table t1, t2, t3, t4;
 --echo #
 create table t1 (x int) with system versioning;
 set debug_dbug='+d,error_vers_wrong_type';
---replace_result $MYSQLTEST_VARDIR . master-data// '' '\\' '/'
+--replace_result $datadir ./
 --error ER_NOT_FORM_FILE
 show create table t1;
+--replace_result $datadir ./
 show warnings;
 drop table t1;
 set global debug_dbug=@old_dbug;