Add missing includes.

Change-Id: Iaa130c0a7eb2cbc0c8486546e5b622661b6d9e23
diff --git a/init/builtins.c b/init/builtins.c
index 5d2a517..d42ec81 100644
--- a/init/builtins.c
+++ b/init/builtins.c
@@ -29,6 +29,7 @@
 #include <stdlib.h>
 #include <sys/mount.h>
 #include <sys/resource.h>
+#include <sys/time.h>
 #include <sys/wait.h>
 #include <linux/loop.h>
 #include <cutils/partition_utils.h>