bootstat: Fix the build on git_mnc-dr1.5-dev-plus-aosp by adding missing
C++ includes

Bug: 21724738
Change-Id: I27e1e8d7897302a1f2d1e4d44c226450194f1933
diff --git a/bootstat/event_log_list_builder.cpp b/bootstat/event_log_list_builder.cpp
index 7eb355a..241e3d5 100644
--- a/bootstat/event_log_list_builder.cpp
+++ b/bootstat/event_log_list_builder.cpp
@@ -17,6 +17,7 @@
 #include "event_log_list_builder.h"
 
 #include <cinttypes>
+#include <memory>
 #include <string>
 #include <android-base/logging.h>
 #include <log/log.h>