def update_sizeofcmds(size)
      fmt = Utils.specialize_format("L=", endianness)
      size_raw = [size].pack(fmt)
      @raw_data[20..23] = size_raw
    end
def update_sizeofcmds(size)
      fmt = Utils.specialize_format("L=", endianness)
      size_raw = [size].pack(fmt)
      @raw_data[20..23] = size_raw
    end
Updates the size of all load commands in the raw data.
 @param size [Integer] the new size, in bytes
 @return [void]
 @api private