MDEV-8491 - On shutdown, report the user and the host executed that.

Fixed main.shutdown failure on Windows.

mysql-test/r/shutdown.result

@@ -8,4 +8,4 @@ drop user user1@localhost;
 #
 # MDEV-8491 - On shutdown, report the user and the host executed that.
 #
-FOUND /mysqld \(root\[root\] @ localhost \[\]\): Normal shutdown/ in mysqld.1.err
+FOUND /mysqld(\.exe)? \(root\[root\] @ localhost \[(::1)?\]\): Normal shutdown/ in mysqld.1.err

mysql-test/t/shutdown.test

@@ -35,5 +35,5 @@ drop user user1@localhost;
 --echo #
 --let SEARCH_FILE= $MYSQLTEST_VARDIR/log/mysqld.1.err
 --let SEARCH_RANGE= -50000
---let SEARCH_PATTERN=mysqld \(root\[root\] @ localhost \[\]\): Normal shutdown
+--let SEARCH_PATTERN=mysqld(\.exe)? \(root\[root\] @ localhost \[(::1)?\]\): Normal shutdown
 --source include/search_pattern_in_file.inc