File _constraints of Package stack

<constraints>
<overwrite>
    <conditions>
      <arch>aarch64</arch>
      <arch>armv7l</arch>
      <arch>armv6l</arch>
    </conditions>
      <hardware>
        <memory>
          <size unit="M">3500</size>
        </memory>
      </hardware>
  </overwrite>
  <overwrite>
    <conditions>
      <arch>ppc64</arch>
      <arch>ppc64le</arch>
    </conditions>
    <hardware>
      <disk>
        <size unit="G">13</size>
      </disk>
    </hardware>
  </overwrite>
</constraints>