Add debug fission support.

src/common/dwarf/bytereader.cc

 // Copyright (c) 2010 Google Inc. All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
@@ skipping 225 matching lines @@
 
   // Remove inappropriate upper bits.
   if (AddressSize() == 4)
     pointer = pointer & 0xffffffff;
   else
     assert(AddressSize() == sizeof(uint64));
 
   return pointer;
 }
 
+Endianness ByteReader::GetEndianness() const {
+  return endian_;
+}
+
 }  // namespace dwarf2reader