Suppress a message that may be emitted on slow systems

On FreeBSD, tests run on persistent storage, and no asynchronous I/O
has been implemented. Warnings about 205-second waits on dict_sys.latch
may occur.

mysql-test/suite/innodb/t/corrupted_during_recovery.test

@@ -8,6 +8,7 @@ call mtr.add_suppression("InnoDB: Database page corruption on disk or a failed r
 call mtr.add_suppression("InnoDB: Failed to read page 3 from file '.*test.t1\\.ibd': Page read from tablespace is corrupted.");
 call mtr.add_suppression("InnoDB: Table `test`.`t1` is corrupted. Please drop the table and recreate.");
 call mtr.add_suppression("InnoDB: File '.*test/t1\\.ibd' is corrupted");
+call mtr.add_suppression("InnoDB: A long wait .* was observed for dict_sys");
 --enable_query_log
 
 let INNODB_PAGE_SIZE=`select @@innodb_page_size`;