[t:2499] Fix broken windows build due to r19902 (merge of 2499d branch)

git-svn-id: file:///svn/toku/tokudb@19935 c7de825b-a66e-492c-adef-691d508d4ae1

windows/dirent.h

 #ifndef _TOKU_DIRENT_H
 #define _TOKU_DIRENT_H
 
+#include "toku_os_types.h"
 #if defined(__cplusplus)
 extern "C" {
 #endif