* tool/gperf.sed: extracted sed commands to a script.  ANSI-C code
  produced by gperf 3.1 declares length arguments as `size_t`.  it
  causes conflict with existing declarations, and needs casts for
  a local variable and return statements.
  [Feature #13883]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61076 b2dd03c8-39d4-4d8f-98ff-823fe69b080e