* probes.d (symbol-create): change argument name `string' to
  `str'. `string' is a keyword for systemtap.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39691 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* tool/gen_ruby_tapset.rb: add tapset generator.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39692 b2dd03c8-39d4-4d8f-98ff-823fe69b080e