driver.rb: measure_target option [ci skip]

* benchmark/driver.rb (BenchmarkDriver.load): restore
  measure_target option from the loaded results.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57288 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

benchmark/driver.rb

@@ -50,6 +50,7 @@ class BenchmarkDriver
       loop = results.assoc((n = "loop_whileloop#{i}").intern) || results.assoc(n)
       obj.instance_variable_set("@loop_wl#{i}", loop ? loop[1].map {|t,*|t} : nil)
     end
+    obj.instance_variable_set("@measure_target", opt[:measure_target] || opt["measure_target"])
     obj
   end