Why elf/sln not build?

[H.J. Lu]

> 
> IMHO this is not a general tool, it is very specific to libc build
> process.  And there is often alread a /sbin/sln that is different.  I
> don't think that it should be installed.
> 

sln in glibc is compatible with /sbin/sln on Linux. I wrote both
of them. In fact, the one in glibc is based on my old sln with the
file list support.

BTW, it is very useful when you have symlinks and shared libraries.

H.J.