File _link of Package mingw64-ngtcp2

<link project="windows:mingw:win64" package="mingw64-ngtcp2" baserev="9e522ec516fc5d3fb5ad7e2813257432">
  <patches>
    <delete name="ngtcp2-1.15.1.tar.xz"/>
    <apply name="project.diff"/>
  </patches>
</link>