src: add missing headers

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I6043ef792c2ce0a8e7584a73f83ca365ec61794d
diff --git a/src/HwmonTempSensor.cpp b/src/HwmonTempSensor.cpp
index dd6ba7c..b195c0c 100644
--- a/src/HwmonTempSensor.cpp
+++ b/src/HwmonTempSensor.cpp
@@ -22,10 +22,13 @@
 #include <boost/algorithm/string/replace.hpp>
 #include <boost/date_time/posix_time/posix_time.hpp>
 #include <iostream>
+#include <istream>
 #include <limits>
+#include <memory>
 #include <sdbusplus/asio/connection.hpp>
 #include <sdbusplus/asio/object_server.hpp>
 #include <string>
+#include <vector>
 
 static constexpr unsigned int sensorPollMs = 500;
 static constexpr unsigned int sensorScaleFactor = 1000;