squashfs: add xattr support configure option

Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
diff --git a/fs/squashfs/inode.c b/fs/squashfs/inode.c
index 25070118..62e63ad 100644
--- a/fs/squashfs/inode.c
+++ b/fs/squashfs/inode.c
@@ -46,6 +46,7 @@
 #include "squashfs_fs_sb.h"
 #include "squashfs_fs_i.h"
 #include "squashfs.h"
+#include "xattr.h"
 
 /*
  * Initialise VFS inode with the base inode information common to all