add ExampleTopWithBlockDevice and tests

src/main/scala/blkdev/TestHarness.scala

@@ -0,0 +1,22 @@
+package blkdev
+
+import diplomacy.LazyModule
+import chisel3._
+import config.Parameters
+import testchipip.GeneratorApp
+import example._
+
+class TestHarness(implicit p: Parameters) extends Module {
+  val io = IO(new Bundle {
+    val success = Output(Bool())
+  })
+
+  val dut = Module(LazyModule(new ExampleTopWithBlockDevice).module)
+  dut.connectSimAXIMem()
+  dut.connectSimBlockDevice()
+  io.success := dut.connectSimSerial()
+}
+
+object Generator extends GeneratorApp {
+  generateFirrtl
+}