zdtm: open with O_CREAT in second argument needs 3 arguments

The mode argument must be supplied when O_CREAT is specified in flags.
Otherwise it will cause compile error due to -Werror is specified.
Signed-off-by: Viktor Konyashkin <vkonyashkin@parallels.com>
Acked-by: Andrew Vagin <avagin@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm/live/static/file_shared.c

@@ -24,7 +24,7 @@ int main(int argc, char **argv)
 
 	test_init(argc, argv);
 
-	fd = open(filename, O_RDWR | O_CREAT);
+	fd = open(filename, O_RDWR | O_CREAT, 0644);
 	if (fd == -1)
 		return 1;
 
@@ -32,7 +32,7 @@ int main(int argc, char **argv)
 	if (fd < 0)
 		return 1;
 
-	fd3 = open(filename, O_RDWR | O_CREAT);
+	fd3 = open(filename, O_RDWR | O_CREAT, 0644);
 	if (fd3 == -1)
 		return 1;