[Support] Try to fix bot failure after 8ddcd1dc26

http://lab.llvm.org:8011/builders/clang-ppc64be-linux/builds/41755

diff --git a/llvm/lib/Support/TimeProfiler.cpp b/llvm/lib/Support/TimeProfiler.cpp
index f2ede75..4709122 100644 (file)
--- a/llvm/lib/Support/TimeProfiler.cpp
+++ b/llvm/lib/Support/TimeProfiler.cpp
@@ -19,6 +19,7 @@
 #include <algorithm>
 #include <cassert>
 #include <chrono>
+#include <mutex>
 #include <string>
 #include <vector>