lispPackages.quicklisp: 2018-04-30 -> 2018-08-31 ; regenerate packages

Added a wrapper package that creates symlinks to OpenSSL libraries with
the actual versions, because we have 1.0.2 with .so-suffix .1.0.0 and
cl-async-ssl is unhappy because of that.

I continue to dislike cl-postgres and simple-date upstream packaging.