Install the .sql files for release 1.1.2 -- this is missing from the
release tarball, but has been fixed in upstream's Github.

Add pglogical_dump, pglogical_origin--1.0.0.sql and
pglogical_origin.control conditionally on the postgresql version --
these are only compiled and installed with postgresql-9.4.x

Submitted by: Anderson Neves <anderson.ufal@gmail.com>