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/fw-update/test/inventory_manager_test.cpp b/fw-update/test/inventory_manager_test.cpp
index 196cb20..dbf5722 100644
--- a/fw-update/test/inventory_manager_test.cpp
+++ b/fw-update/test/inventory_manager_test.cpp
@@ -1,9 +1,9 @@
-#include "libpldm/firmware_update.h"
-
 #include "common/utils.hpp"
 #include "fw-update/inventory_manager.hpp"
 #include "requester/test/mock_request.hpp"
 
+#include <libpldm/firmware_update.h>
+
 #include <gtest/gtest.h>
 
 using namespace pldm;