http://bugs.gentoo.org/show_bug.cgi?id=99616

Similar to the usage of chown on Darwin in bug #98827, ebuild.sh uses chown
on symlinks which can alter the target where the intention is to modify the
symlink. This patch adds no-op lchown and lchgrp functions to ebuild.sh.
Profiles should override these to provide the correct implementation for
the specific userland.

(Apologies to the bug poster!)

-- 
Jason Stubbs