Try to fix the msvc build.

llvm-svn: 207594

llvm/examples/BrainF/BrainFDriver.cpp

@@ -31,6 +31,7 @@
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/Verifier.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/FileSystem.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/TargetSelect.h"
 #include "llvm/Support/raw_ostream.h"

llvm/lib/IR/ConstantsContext.h

@@ -24,6 +24,7 @@
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/raw_ostream.h"
 #include <map>
+#include <tuple>
 
 #define DEBUG_TYPE "ir"