DB-437 add row operations status
This feature is show as follows:
mysql>SHOW ENGINE TOKUDB STATUS;
....
Type: TokuDB
Name: row: operation status
Status: Number of rows inserted 3905, updated 3350, deleted 1016, read 3461
657.09 inserts/s, 322.88 updates/s, 876.90 deletes/s, 1230.48 reads/s