Suppress messages about long semaphore waits in innodb_bug34300.test.

mysql-test/suite/innodb/t/innodb_bug34300.test

@@ -7,6 +7,7 @@
 
 -- disable_query_log
 -- disable_result_log
+call mtr.add_suppression("InnoDB: Warning: a long semaphore wait:");
 
 # set packet size and reconnect 
 SET @@global.max_allowed_packet=16777216;

mysql-test/suite/innodb_plugin/t/innodb_bug34300.test

@@ -7,6 +7,7 @@
 
 -- disable_query_log
 -- disable_result_log
+call mtr.add_suppression("InnoDB: Warning: a long semaphore wait:");
 
 # set packet size and reconnect 
 let $max_packet=`select @@global.max_allowed_packet`;