File _link of Package virtualbox.openSUSE_Leap_15.4_Update

<link project="openSUSE:Leap:15.4:Update" package="virtualbox" rev="953ce38af71aee84a1cf0082b721ecb5" vrev="2.30" baserev="953ce38af71aee84a1cf0082b721ecb5">
  <patches>
    <branch></branch>
  </patches>
</link>