src: add missing headers

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I6043ef792c2ce0a8e7584a73f83ca365ec61794d
diff --git a/src/ExitAirTempSensor.cpp b/src/ExitAirTempSensor.cpp
index e8bba14..9692f7f 100644
--- a/src/ExitAirTempSensor.cpp
+++ b/src/ExitAirTempSensor.cpp
@@ -21,14 +21,23 @@
 
 #include <math.h>
 
+#include <array>
 #include <boost/algorithm/string/predicate.hpp>
 #include <boost/algorithm/string/replace.hpp>
+#include <boost/container/flat_map.hpp>
 #include <chrono>
+#include <cmath>
+#include <functional>
 #include <iostream>
 #include <limits>
+#include <memory>
 #include <numeric>
 #include <sdbusplus/asio/connection.hpp>
 #include <sdbusplus/asio/object_server.hpp>
+#include <sdbusplus/bus/match.hpp>
+#include <stdexcept>
+#include <utility>
+#include <variant>
 #include <vector>
 
 constexpr const float altitudeFactor = 1.14;