Speculative build fix for scudo/standalone/tests/combined_test.cpp

GitOrigin-RevId: 102997cd0edb127050553a33a902bd6621c2c184
diff --git a/tests/combined_test.cpp b/tests/combined_test.cpp
index b5035d0..c144ad0 100644
--- a/tests/combined_test.cpp
+++ b/tests/combined_test.cpp
@@ -12,6 +12,7 @@
 #include "combined.h"
 
 #include <condition_variable>
+#include <memory>
 #include <mutex>
 #include <thread>
 #include <vector>