On some Unix-like platforms, there is no such thing as versioned shared
libraries. In this case, platform->sharedlib_simple() should simply
return undef. Among others, this avoids the shared libraries to be
installed as symlinks on themselves.
Reviewed-by: Tomas Mraz <firstname.lastname@example.org>
Reviewed-by: Paul Dale <email@example.com>
(Merged from https://github.com/openssl/openssl/pull/16023)