File _constraints of Package rust

<?xml version="1.0"?>
<constraints>
  <hardware>
    <disk>
        <size unit="G">36</size>
    </disk>
    <processors>8</processors>
    <physicalmemory>
        <size unit="G">8</size>
    </physicalmemory>
    <memory>
      <size unit="G">8</size>
    </memory>
  </hardware>
</constraints>