Update path to master-bin file

mysql-test/t/mysqlbinlog_base64.test:
  Update path to master-bin file
  Remove non portable "exec rm"

mysql-test/t/mysqlbinlog_base64.test

@@ -15,8 +15,9 @@ load data infile '../../std_data/words.dat' into table t2;
 #
 #  Save binlog
 #
+let $MYSQLD_DATADIR=`select @@datadir`;
 flush logs;
---exec $MYSQL_BINLOG --hexdump $MYSQLTEST_VARDIR/log/master-bin.000001 > $MYSQLTEST_VARDIR/tmp/mysqlbinlog_base64.sql
+--exec $MYSQL_BINLOG --hexdump $MYSQLD_DATADIR/master-bin.000001 > $MYSQLTEST_VARDIR/tmp/mysqlbinlog_base64.sql
 
 #
 #  Clear database and restore from binlog
@@ -51,7 +52,7 @@ insert into t2 select * from t2;
 select count(*) from t2;
 
 flush logs;
---exec $MYSQL_BINLOG --hexdump $MYSQLTEST_VARDIR/log/master-bin.000003 > $MYSQLTEST_VARDIR/tmp/mysqlbinlog_base64.sql
+--exec $MYSQL_BINLOG --hexdump $MYSQLD_DATADIR/master-bin.000003 > $MYSQLTEST_VARDIR/tmp/mysqlbinlog_base64.sql
 --exec $MYSQL test < $MYSQLTEST_VARDIR/tmp/mysqlbinlog_base64.sql
 
 #
@@ -62,6 +63,6 @@ select count(*) from t2;
 #
 #  Test cleanup
 #
---exec rm $MYSQLTEST_VARDIR/tmp/mysqlbinlog_base64.sql
+--remove_file $MYSQLTEST_VARDIR/tmp/mysqlbinlog_base64.sql
 drop table t1;
 drop table t2;