All reports of lengthy-symlink for the archive. The extended description of this tag is:
This link goes up, and then back down into the same subdirectory. Making it shorter will improve its chances of finding the right file if the user's system has lots of symlinked directories.
If you use debhelper, running dh_link after creating the package structure will fix this problem for you.
Refer to Debian Policy Manual section 10.5 (Symbolic links) for details.
This tag has not been emitted in any package tested by Lintian.