Add a header file to support ssize_t for windows

fixing
https://github.com/llvm/llvm-project/commit/0ece51c60c51f0d4c285dbda3b6cff794041bdd7

diff --git a/llvm/include/llvm/Support/raw_ostream.h b/llvm/include/llvm/Support/raw_ostream.h
index 5e68390..bd15f97 100644 (file)
--- a/llvm/include/llvm/Support/raw_ostream.h
+++ b/llvm/include/llvm/Support/raw_ostream.h
@@ -15,6 +15,7 @@
 
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
+#include "llvm/Support/DataTypes.h"
 #include <cassert>
 #include <chrono>
 #include <cstddef>