Add missing includes.

Change-Id: Ibf549266a19a67eb9158d341a69dddfb654be669
diff --git a/libc/bionic/dirent.cpp b/libc/bionic/dirent.cpp
index 6d87097..fb45398 100644
--- a/libc/bionic/dirent.cpp
+++ b/libc/bionic/dirent.cpp
@@ -30,6 +30,8 @@
 
 #include <errno.h>
 #include <fcntl.h>
+#include <malloc.h>
+#include <string.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>