File _constraints of Package root

<constraints>
  <hardware>
    <disk>
      <size unit="G">6</size>
    </disk>
    <physicalmemory>
      <size unit="G">6</size>
    </physicalmemory>
  </hardware>
  <overwrite>
    <conditions>
      <arch>armv6l</arch>
      <arch>armv7l</arch>
    </conditions>
     <hardware>
      <disk>
       <size unit="M">220</size>
      </disk>
     <physicalmemory>
        <size unit="M">320</size>
     </physicalmemory>
    </hardware>
  </overwrite>
</constraints>