Support versioned shared library sonames

[kkremitzki]

While packaging smesh, I ran into two significant problems from lintian, the Debian package linting tool:

https://lintian.debian.org/tags/shlib-without-versioned-soname.html https://lintian.debian.org/tags/dev-pkg-without-shlib-symlink.html

This patch resolves the issues discussed in these links.