Provide an appropriate ld.so.conf snippet for amd64.
It turns out that many of the TSM binaries are still ia32. So we need
to install all the i386 rpms even on x86_64. The i386 PLIST is the
main one, and the x86_64 is an addition.

On my NetBSD/amd64 xen DomU, the linux ldconfig dumps core for unknown
reasons, so I cannot yet verify what else is missing - I guess we'll
need to depend on the suse32 libraries.