extblkdev/vdo: add missing includes

Signed-off-by: Max Kellermann <[email protected]>

Author: MaxKellermann

src/extblkdev/vdo/ExtBlkDevVdo.cc

@@ -20,9 +20,11 @@
 #include "ExtBlkDevVdo.h"
 #include "common/blkdev.h"
 #include "include/stringify.h"
-#include <errno.h>
 #include "common/debug.h"
 
+#include <dirent.h> // for opendir()
+#include <errno.h>
+
 #define dout_subsys ceph_subsys_bdev
 #define dout_context cct
 #undef dout_prefix