[ORC] Add missing include.

diff --git a/llvm/include/llvm/ExecutionEngine/Orc/Shared/SimpleRemoteEPCUtils.h b/llvm/include/llvm/ExecutionEngine/Orc/Shared/SimpleRemoteEPCUtils.h
index 83929a8..7d1df16 100644 (file)
--- a/llvm/include/llvm/ExecutionEngine/Orc/Shared/SimpleRemoteEPCUtils.h
+++ b/llvm/include/llvm/ExecutionEngine/Orc/Shared/SimpleRemoteEPCUtils.h
@@ -21,6 +21,7 @@
 #include "llvm/ExecutionEngine/Orc/Shared/SimplePackedSerialization.h"
 #include "llvm/Support/Error.h"
 
+#include <mutex>
 #include <string>
 #include <thread>