File _link of Package libtool

<link project="openSUSE:11.4" package="libtool"  >
<patches>
  <!-- <apply name="patch" /> apply a patch on the source directory  -->
  <topadd>BuildRequires: gcc-c++</topadd>
  <!-- <add>file.patch</add> add a patch to be applied after %setup (spec file only) -->
  <!-- <delete>filename</delete> delete a file -->
</patches>
</link>