* tool/enc-unicode.rb: add comment why it uses Hash#index.
* enc/unicode/{name2ctype.kwd,name2ctype.src,name2ctype.h.blt}:
update to follow the current name2ctype.h.
FYI current Unicode version is 6.1.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36070 b2dd03c8-39d4-4d8f-98ff-823fe69b080e