git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41474 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* benchmark/gc/gcbench.rb: moved from tool/gcbench.rb. * benchmark/gc/hash(1|2).rb: ditto. * benchmark/gc/rdoc.rb: ditto. * benchmark/gc/null.rb: added. * common.mk: fix rule. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41473 b2dd03c8-39d4-4d8f-98ff-823fe69b080e