Fix typo

Author: Michael Banck

Author: mhagander

src/bin/pg_basebackup/t/010_pg_basebackup.pl

@@ -334,7 +334,7 @@
 $node->command_ok(
 	[ 'pg_basebackup', '-D', "$tempdir/backupxs", '-X', 'stream' ],
 	'pg_basebackup -X stream runs');
-ok(grep(/^[0-9A-F]{24}$/, slurp_dir("$tempdir/backupxf/pg_wal")),
+ok(grep(/^[0-9A-F]{24}$/, slurp_dir("$tempdir/backupxs/pg_wal")),
 	'WAL files copied');
 $node->command_ok(
 	[ 'pg_basebackup', '-D', "$tempdir/backupxst", '-X', 'stream', '-Ft' ],