Fix multithreaded_alloc build.

Change-Id: I61ba38b437dbb5a320f05f367748a0ea27425a78
diff --git a/tools/multithreaded_alloc.cc b/tools/multithreaded_alloc.cc
index 6fa43e6..21cf21b 100644
--- a/tools/multithreaded_alloc.cc
+++ b/tools/multithreaded_alloc.cc
@@ -114,7 +114,7 @@
   for (std::thread& th : threads)
     th.join();
 
-  printf("%lld,%lld,%" PRIu64 ",%" PRIu64 "\n", no_threads, runtime_ms, g_rate,
-         allocs.load(std::memory_order_relaxed));
+  printf("%" PRIu64 ",%" PRIu64 ",%" PRIu64 ",%" PRIu64 "\n", no_threads,
+         runtime_ms, g_rate, allocs.load(std::memory_order_relaxed));
   return 0;
 }