Add missing include

list was included through a dependency on sdbusplus which no longer
provides it, so it needs to be explicitly included here.

Change-Id: Ia39a1cd6b41c1837503ea9c0a8d272739589235f
Signed-off-by: Jason M. Bills <jason.m.bills@intel.com>
diff --git a/hsbp-manager/src/hsbp_manager.cpp b/hsbp-manager/src/hsbp_manager.cpp
index bc92a32..51f733d 100644
--- a/hsbp-manager/src/hsbp_manager.cpp
+++ b/hsbp-manager/src/hsbp_manager.cpp
@@ -27,6 +27,7 @@
 #include <fstream>
 #include <gpiod.hpp>
 #include <iostream>
+#include <list>
 #include <sdbusplus/asio/connection.hpp>
 #include <sdbusplus/asio/object_server.hpp>
 #include <sdbusplus/bus/match.hpp>