Pick the right overload in EvaluateTask.runTask

The deprecated method should forward to the other overloaded alternative
but it recursed instead.

This kind of mistake would be easily caught by linter warning about
unused `newConfig` local variable. I hope we'll get there some day.

Fixes #1251

main/src/main/scala/sbt/EvaluateTask.scala

@@ -292,7 +292,7 @@ object EvaluateTask
     def runTask[T](root: Task[T], state: State, streams: Streams, triggers: Triggers[Task], config: EvaluateConfig)(implicit taskToNode: NodeView[Task]): (State, Result[T]) =
     {
     	val newConfig = EvaluateTaskConfig(config)
-    	runTask(root, state, streams, triggers, config)(taskToNode)
+    	runTask(root, state, streams, triggers, newConfig)(taskToNode)
     }
 	def runTask[T](root: Task[T], state: State, streams: Streams, triggers: Triggers[Task], config: EvaluateTaskConfig)(implicit taskToNode: NodeView[Task]): (State, Result[T]) =
 	{