Log Message:
textproc/ruby-rexml: re-add package version 3.2.4

ruby-rexml was bundled to ruby base package and removed past.

Ruby 3.0 dose not bundle rexml library any more, so re-add its latest
version now.

REXML

REXML was inspired by the Electric XML library for Java, which features an
easy-to-use API, small size, and speed.  Hopefully, REXML, designed with the
same philosophy, has these same features.  I've tried to keep the API as
intuitive as possible, and have followed the Ruby methodology for method
naming and code flow, rather than mirroring the Java API.

REXML supports both tree and stream document parsing.  Stream parsing is
faster (about 1.5 times as fast).  However, with stream parsing, you don't
get access to features such as XPath.