Add some missing *.h files

This commit was SVN r1277.

src/util/os_create_dirpath.c

@@ -8,6 +8,7 @@
 #include <string.h>
 #include <unistd.h>
 #include <libgen.h>
+#include <stdlib.h>
 
 #include "include/constants.h"
 #include "util/os_create_dirpath.h"

src/util/os_create_dirpath.h

@@ -24,6 +24,7 @@
  **/
 
 #include <stdio.h>
+#include <sys/types.h>
 #include <sys/stat.h>
 
 /**