Ruby » Ruby master

• Merge Onigmo-5.13.1. [ruby-dev:45057] [Feature #5820]
  https://github.com/k-takata/Onigmo
  cp reg{comp,enc,error,exec,parse,syntax}.c reg{enc,int,parse}.h
  cp oniguruma.h
  cp tool/enc-unicode.rb
  cp -r enc/

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34663 b2dd03c8-39d4-4d8f-98ff-823fe69b080e