Update devel/ruby-facade to 1.0.4.

* Use lang/ruby/gem.mk instead of misc/rubygems/rubygem.mk.
* Add LICENSE.
* Remove default value of GEM_BUILD.

== 1.0.4 - 3-Aug-2009
* Fixed a symbol vs string issue for Ruby 1.9.x.

== 1.0.3 - 21-Jul-2009
* License changed to Artistic 2.0.
* Documentation updates.
* Test file renamed to test_facade.rb.
* Some Rakefile and gemspec updates
* One test modified so that it passes with 1.9.x as well.

(taca)