storagehandler: add missing cstdint header

Change-Id: I3837f2f3219e6b641ebb237a405ce36bd2374c0f
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/storagehandler.h b/storagehandler.h
index 17ac7b8..0aef3e3 100644
--- a/storagehandler.h
+++ b/storagehandler.h
@@ -1,6 +1,8 @@
 #ifndef __HOST_IPMI_STORAGE_HANDLER_H__
 #define __HOST_IPMI_STORAGE_HANDLER_H__
 
+#include <cstdint>
+
 // IPMI commands for Storage net functions.
 enum ipmi_netfn_storage_cmds
 {