Add deprecations for lang/erlang-runtime1* & dependent ports
databases/couchdb and databases/riak as communicated on erlang@FreeBSD
list end of May 2019, with dates adjusted for my tardiness on committing
this.

Reviewed by: jrm
Approved by: olgeni, rm
Sponsored by: SkunkWerks, GmbH
Differential Revision: https://reviews.freebsd.org/D20449