nilfs2: use octal for unreadable permission macro

Replace S_IRWXUGO with 0777 because symbolic permissions are considered
harmful:

 https://lwn.net/Articles/696229/

Link: http://lkml.kernel.org/r/1509367935-3086-5-git-send-email-konishi.ryusuke@lab.ntt.co.jp
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/nilfs2/namei.c

@@ -150,7 +150,7 @@ static int nilfs_symlink(struct inode *dir, struct dentry *dentry,
 	if (err)
 		return err;
 
-	inode = nilfs_new_inode(dir, S_IFLNK | S_IRWXUGO);
+	inode = nilfs_new_inode(dir, S_IFLNK | 0777);
 	err = PTR_ERR(inode);
 	if (IS_ERR(inode))
 		goto out;