libc6-compat: add symlink for linux loader

Hi,

I dont know where else to post requests for the Packages, and dont know how to contact the maintainer. So..

The libc6-compat package should allow to run binaries from other distros (typically when you dont have the sources).
On x86-64 atleast this is not working seamless, as the binaries built from popular systems (atleast all debian-based) will require the loader /lib64/ld-linux-x86-64.so.2

Thus the libc6-compat package should provide the loader as symlink.

A list of loader paths ist on this page: https://wiki.debian.org/Multiarch/LibraryPathOverview