message: Move for GCC-4.8
diff: @@ -299,7 +299,7 @@ unique_ptr<FileBuffer> BufferManager::ReadTemporaryBuffer(block_id_t id) {
  // now allocate a buffer of this size and read the data into that buffer
  auto buffer = make_unique<ManagedBuffer>(*this, alloc_size + Storage::BLOCK_HEADER_SIZE, false, id);
  buffer->Read(*handle, sizeof(idx_t));
  - return buffer;
  + return move(buffer);
  }
  void BufferManager::DeleteTemporaryFile(block_id_t id) {
  