Convert another use of createUniqueFile to TempFile::create.

llvm-svn: 318427
diff --git a/llvm/tools/bugpoint/BugDriver.h b/llvm/tools/bugpoint/BugDriver.h
index af80e8b..5eaad34 100644
--- a/llvm/tools/bugpoint/BugDriver.h
+++ b/llvm/tools/bugpoint/BugDriver.h
@@ -18,6 +18,7 @@
 
 #include "llvm/IR/ValueMap.h"
 #include "llvm/Support/Error.h"
+#include "llvm/Support/FileSystem.h"
 #include "llvm/Transforms/Utils/ValueMapper.h"
 #include <memory>
 #include <string>
@@ -278,6 +279,11 @@
   Error initializeExecutionEnvironment();
 };
 
+struct DiscardTemp {
+  sys::fs::TempFile &File;
+  ~DiscardTemp();
+};
+
 ///  Given a bitcode or assembly input filename, parse and return it, or return
 ///  null if not possible.
 ///