Add driver support for invoking block rewriter.
Also tweaked the create function to take an explicit output file.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@56305 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Driver/ASTConsumers.h b/Driver/ASTConsumers.h
index 8375a8d..c1bf230 100644
--- a/Driver/ASTConsumers.h
+++ b/Driver/ASTConsumers.h
@@ -59,6 +59,7 @@
                                  Diagnostic &Diags);
 
 ASTConsumer *CreateBlockRewriter(const std::string& InFile,
+                                 const std::string& OutFile,
                                  Diagnostic &Diags,
                                  const LangOptions &LangOpts);
 } // end clang namespace