Reorder includes to unbreak MSVC

src/bin/pg_dump/pg_backup_directory.c

@@ -33,12 +33,12 @@
  *-------------------------------------------------------------------------
  */
 
-#include <dirent.h>
-#include <sys/stat.h>
-
 #include "pg_backup_archiver.h"
 #include "compress_io.h"
 
+#include <dirent.h>
+#include <sys/stat.h>
+
 typedef struct
 {
 	/*