Ruby

enc-unicode.rb: for gperf 3.1

• tool/enc-unicode.rb: support for gperf 3.1, which defines length
  arguments as size_t but a local variable as unsigned int.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60976 b2dd03c8-39d4-4d8f-98ff-823fe69b080e