File _constraints of Package cross-arm-none-eabi-gcc7

<?xml version="1.0"?>
<constraints>
  <hardware>
    <memory>
      <size unit="G">4</size>
    </memory>
    <disk>
        <size unit="G">10</size>
    </disk>
  </hardware>
  <sandbox exclude="true">xen</sandbox>
</constraints>