message: Fix 32-bit builds broken by 320813
  cast to size_t to avoid narrowing error.
diff: @@ -3496,7 +3496,7 @@ size_t ObjectFileELF::ReadSectionData(Section *section,
  auto Decompressor = llvm::object::Decompressor::create(
  section->GetName().GetStringRef(),
  {reinterpret_cast<const char *>(section_data.GetDataStart()),
  - section_data.GetByteSize()},
  + size_t(section_data.GetByteSize())},
  GetByteOrder() == eByteOrderLittle, GetAddressByteSize() == 8);
  if (!Decompressor) {
  LLDB_LOG(log, "Unable to initialize decompressor for section {0}: {1}",
  @@ -3507,7 +3507,7 @@ size_t ObjectFileELF::ReadSectionData(Section *section,
  std::make_shared<DataBufferHeap>(Decompressor->getDecompressedSize(), 0);
  if (auto Error = Decompressor->decompress(
  {reinterpret_cast<char *>(buffer_sp->GetBytes()),
  - buffer_sp->GetByteSize()})) {
  + size_t(buffer_sp->GetByteSize())})) {
  LLDB_LOG(log, "Decompression of section {0} failed: {1}",
  section->GetName(), llvm::toString(std::move(Error)));
  return result;
  