Unbreaking the MSVC build by adding an include. It broke with r181832.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181853 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/AST/Decl.h b/include/clang/AST/Decl.h
index 937035a..aafd0bc 100644
--- a/include/clang/AST/Decl.h
+++ b/include/clang/AST/Decl.h
@@ -24,6 +24,7 @@
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/Optional.h"
#include "llvm/Support/Compiler.h"
+#include "llvm/Support/raw_ostream.h"
namespace clang {
struct ASTTemplateArgumentListInfo;
