devel/ruby-railties52: add version 5.2.2 package

Add ruby-railties52 version 5.2.2 package.

= Railties -- Gluing the Engine to the Rails

Railties is responsible to glue all frameworks together. Overall, it:

* handles all the bootstrapping process for a Rails application;

* manager rails command line interface;

* provides Rails generators core;

This is for Ruby on Rails 5.2.

(taca)