MariaRocks port: get rocksdb.checksum_table to work

MariaDB has a different checksumming algorithm. Old one
can be used by setting @@old=1

storage/rocksdb/mysql-test/rocksdb/r/checksum_table.result

@@ -66,6 +66,10 @@ col1 varchar(10),
 col2 tinyint,
 col3 double
 ) engine=rocksdb;
+# MariaDB has changed the checksumming algorithm
+# Enable the old algorithm:
+set @tmp_old=@@old;
+set old=1;
 checksum table t1;
 Table	Checksum
 test.t1	0
@@ -84,4 +88,5 @@ insert into t1 values (6, '',            NULL, 2.78);
 checksum table t1;
 Table	Checksum
 test.t1	3183101003
+set old=@tmp_old;
 drop table t1;

storage/rocksdb/mysql-test/rocksdb/t/checksum_table.test

@@ -58,6 +58,12 @@ create table t1 (
   col3 double
 ) engine=rocksdb;
 
+--echo # MariaDB has changed the checksumming algorithm
+--echo # Enable the old algorithm:
+set @tmp_old=@@old;
+set old=1;
+
+
 checksum table t1;
 
 insert into t1 values (1, NULL,  NULL, NULL);
@@ -72,5 +78,7 @@ insert into t1 values (5, 'xxxYYYzzzT',  NULL, 2.78);
 insert into t1 values (6, '',            NULL, 2.78);
 checksum table t1;
 
+set old=@tmp_old;
+
 drop table t1;