Debug Controls (#639)

* debug: Bump OpenOCD version to one that drives resets and sets cmderr appropriately.

* debug: Export the dmactive and ndreset signals to the top level and drive reset as intended in the TestHarness.

src/main/scala/rocketchip/TestHarness.scala

@@ -14,7 +14,10 @@ class TestHarness()(implicit p: Parameters) extends Module {
   val io = new Bundle {
     val success = Bool(OUTPUT)
   }
+
   val dut = Module(LazyModule(new ExampleRocketTop).module)
+  dut.reset := reset | dut.io.ndreset
+
 
   dut.io.interrupts := UInt(0)