Fix try for Buildbot test failure for tests

	innodb_bug12400341
	innodb-mdev7046
	innodb_stats_fetch_nonexistent

mysql-test/suite/innodb/r/innodb_bug12400341.result

-call mtr.add_suppression("InnoDB: Warning: cannot find a free slot for an undo log. Do you have too");
+call mtr.add_suppression("InnoDB: Warning: cannot find a free slot for an undo log. Do you have too*");
 set @old_innodb_undo_logs = @@innodb_undo_logs;
 set global innodb_undo_logs=1;
 show variables like "max_connections";

mysql-test/suite/innodb/r/innodb_stats_fetch_nonexistent.result

+call mtr.add_suppression("InnoDB: Error: Fetch of persistent statistics requested for table*");
 CREATE TABLE test_ps_fetch_nonexistent
 (a INT, PRIMARY KEY (a))
 ENGINE=INNODB STATS_PERSISTENT=1;

mysql-test/suite/innodb/t/innodb-mdev7046.test

@@ -9,6 +9,7 @@
 # Ignore OS errors
 call mtr.add_suppression("InnoDB: File ./test/t1*");
 call mtr.add_suppression("InnoDB: Error number*");
+call mtr.add_suppression("InnoDB: File ./test/t1#p#p1#sp#p1sp0.ibd: 'rename' returned OS error*");
 
 # MDEV-7046: MySQL#74480 - Failing assertion: os_file_status(newpath, &exists, &type) 
 # after Operating system error number 36 in a file operation

mysql-test/suite/innodb/t/innodb_bug12400341.test

@@ -11,7 +11,10 @@ if (`select count(*)=0 from information_schema.global_variables where variable_n
 # and cause unstable result.
 --source include/not_valgrind.inc
 
-call mtr.add_suppression("InnoDB: Warning: cannot find a free slot for an undo log. Do you have too");
+# Previous undo slots cause unnecessary failures
+--source include/not_windows.inc
+
+call mtr.add_suppression("InnoDB: Warning: cannot find a free slot for an undo log. Do you have too*");
 
 --disable_query_log
 set @old_innodb_trx_rseg_n_slots_debug = @@innodb_trx_rseg_n_slots_debug;

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

@@ -4,6 +4,8 @@
 
 -- source include/have_innodb.inc
 
+call mtr.add_suppression("InnoDB: Error: Fetch of persistent statistics requested for table*");
+
 -- vertical_results
 
 CREATE TABLE test_ps_fetch_nonexistent