fallout of cleaning-up libutils includes

Test: run & compile
Bug: n/a

Change-Id: I99e462d2db6560742fa3f065d5de50cd60111130
diff --git a/cmds/surfacereplayer/replayer/Replayer.h b/cmds/surfacereplayer/replayer/Replayer.h
index f757fc3..f36c9fd 100644
--- a/cmds/surfacereplayer/replayer/Replayer.h
+++ b/cmds/surfacereplayer/replayer/Replayer.h
@@ -29,6 +29,7 @@
 #include <utils/Errors.h>
 #include <utils/StrongPointer.h>
 
+#include <stdatomic.h>
 #include <condition_variable>
 #include <memory>
 #include <mutex>