File _constraints of Package boost

<?xml version="1.0"?>
<constraints>
  <hardware>
    <physicalmemory>
      <size unit="M">2000</size>
    </physicalmemory>
    <disk>
      <size unit="G">5</size>
    </disk>
  </hardware>
  <sandbox>kvm</sandbox>
  <hostlabel exclude="true">SLOW_CPU</hostlabel>
</constraints>