Add option to pnacl-abicheck to handle pnacl bitcode

include/llvm/IRReader/IRReader.h

 //===-- llvm/IRReader/IRReader.h - Reader of IR  ----------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This header defines IR readers that understand LLVM and PNaCl file formats.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_IRREADER_IRREADER_H
 #define LLVM_IRREADER_IRREADER_H
 
 namespace llvm {
 
-class LLVM_Context;
+class LLVMContext;
 class MemoryBuffer;
+class Module;
 class SMDiagnostic;
 
 // \brief Define the expected format of the file.
 enum NaClFileFormat {
   // LLVM IR source or bitcode file (as appropriate).
   LLVMFormat,
   // PNaCl bitcode file.
   PNaClFormat
 };
 
 // \brief If the given MemoryBuffer holds a bitcode image, return a Module
 // for it.  Otherwise, attempt to parse it as LLVM Assembly and return
 // a Module for it. This function *always* takes ownership of the given
 // MemoryBuffer.
 Module *NaClParseIR(MemoryBuffer *Buffer,
                     NaClFileFormat Format,
                     SMDiagnostic &Err,
                     LLVMContext &Context);
 
 /// \brief If the given file holds a Bitcode image, read the file.
 /// Otherwise, attempt to parse it as LLVM assembly and return a
 /// Module for it.
 Module *NaClParseIRFile(const std::string &Filename,
                         NaClFileFormat Format,
                         SMDiagnostic &Err,
                         LLVMContext &Context);
 
 } // end llvm namespace
 #endif