Bug#632682: kfreebsd-amd64 and /lib64 -> lib symlink

[Petr Salinger <Petr.Salinger@seznam.cz>]

Hi,

I looked at just commited r4891, and it seems that it breaks 
kfreebsd-amd64 seriously.

On kfreebsd-amd64, the ELF interpreter is "/lib/ld-kfreebsd-x86-64.so.1", 
i.e. it is really in /lib, not in /lib64.

The "lib64 -> lib" symlinks in previous eglibc versions only have been
as defence against broken packages shipping their libs in lib64.

This part of libc.preinst seems to delete our ELF interpreter: 
remove_lib64_symlink() {
...
rm -f /lib/$(basename RTLD_SO)
}

On kfreebsd-amd64 the "lib64 -> lib" symlinks are optional,
but "/lib/ld-kfreebsd-x86-64.so.1" is not ;-)

Petr