[C++11] Add missing include.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@202757 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/clang/Basic/VersionTuple.h b/include/clang/Basic/VersionTuple.h
index c054423befda6b3b37d95c34976fec67b18a8591..54d06e07396ad968eedb6bc1f736f51533b13594 100644 (file)
--- a/include/clang/Basic/VersionTuple.h
+++ b/include/clang/Basic/VersionTuple.h
@@ -18,6 +18,7 @@
 #include "clang/Basic/LLVM.h"
 #include "llvm/ADT/Optional.h"
 #include <string>
+#include <tuple>
 
 namespace clang {