Previously, the "out" output of openssl would contain would contain a
couple of tiny libraries in etc/, and the big OpenSSL libraries in
lib/. This bloated closures when building things against OpenSSL with
pkgsStatic. To fix this, introduce a lib output, so only the config
files are left in out.
Additionally, we have to disable support for dynamic engines in static
builds to avoid a reference to the engines directory in $lib. I don't
think it's likely that this would ever have worked anyway.