Some binaries generated by util-linux will be replaced by core-utils
in the final image by update-alternatives, so use a dedicated directory
with symlinks to avoid using a binary generated by another package.
This will solve the issue with the ptest runner timing out when
running the kill ptests for util-linux.
[YOCTO #13238]
Signed-off-by: Mariano Lopez <just.another.mariano@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>