encoding.h: include ruby/ruby.h
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56478 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
encoding.h: include ruby/ruby.h
enum ruby_fl_type and VALUE.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56478 b2dd03c8-39d4-4d8f-98ff-823fe69b080e