make groundtest and unitest peers of rocketchip, with their own packages, harnesses and configs

src/main/scala/groundtest/Coreplex.scala

@@ -0,0 +1,9 @@
+package groundtest
+
+import Chisel._
+import cde.{Parameters}
+import coreplex.{CoreplexConfig, DefaultCoreplex}
+
+class GroundTestCoreplex(tp: Parameters, tc: CoreplexConfig) extends DefaultCoreplex(tp, tc) {
+  io.success := tileList.flatMap(_.io.elements get "success").map(_.asInstanceOf[Bool]).reduce(_&&_)
+}