File _link of Package libxml2

<link project="devel:libraries:c_c++" package="libxml2" baserev="a7a2fec286fa47e13325414d81f4f6dc">
  <patches>
    <delete name="libxml2-2.14.5.tar.xz"/>
    <delete name="libxml2-python3-unicode-errors.patch"/>
    <apply name="project.diff"/>
  </patches>
</link>