MDEV-30064: binlog.binlog_mysqlbinlog_raw_flush sometimes fails with Errcode:...

MDEV-30064: binlog.binlog_mysqlbinlog_raw_flush sometimes fails with Errcode: 2 "No such file or directory"

Increase a 1-second timeout, which is a bit too small for slow buildbot
builders.
Signed-off-by: Kristian Nielsen <knielsen@knielsen-hq.org>

mysql-test/suite/binlog/t/binlog_mysqlbinlog_raw_flush.test

@@ -37,7 +37,7 @@ FLUSH LOGS;
 INSERT INTO t1 VALUES (1);
 
 # Read binlog data from master to intermediary result file
---let TIMEOUT=1
+--let TIMEOUT=5
 --echo # timeout TIMEOUT MYSQL_BINLOG --raw --read-from-remote-server --user=root --host=127.0.0.1 --port=MASTER_MYPORT --stop-never --result-file=MYSQLTEST_VARDIR/tmp/ master-bin.000001
 --error 124 # Error 124 means timeout was reached
 --exec timeout $TIMEOUT $MYSQL_BINLOG --raw --read-from-remote-server --user=root --host=127.0.0.1 --port=$MASTER_MYPORT --stop-never --result-file=$MYSQLTEST_VARDIR/tmp/ master-bin.000001