libpldm: Correct reference to libpldm header files

When relying on header files from external libraries, #include<> should
be used instead of #include "" to avoid ambiguity.

Tested: Built pldm successfully after enabling ibm-oem

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: Ia1997de7e0f61564055bbd837f4e24c8f14e55a5
diff --git a/host-bmc/dbus_to_event_handler.hpp b/host-bmc/dbus_to_event_handler.hpp
index 83cb792..886d6b5 100644
--- a/host-bmc/dbus_to_event_handler.hpp
+++ b/host-bmc/dbus_to_event_handler.hpp
@@ -1,11 +1,11 @@
 #pragma once
 
-#include "libpldm/platform.h"
-
 #include "libpldmresponder/pdr_utils.hpp"
 #include "pldmd/dbus_impl_requester.hpp"
 #include "requester/handler.hpp"
 
+#include <libpldm/platform.h>
+
 #include <map>
 
 namespace pldm