BC native tests port to Konan's TestRunner

backend.native/tests/runtime/memory/cycles0.kt

@@ -1,3 +1,7 @@
+package runtime.memory.cycles0
+
+import kotlin.test.*
+
 data class Node(val data: Int, var next: Node?, var prev: Node?, val outer: Node?)
 
 fun makeCycle(len: Int, outer: Node?): Node {
@@ -35,7 +39,7 @@ fun createCycles(junk: Node) {
 
 }
 
-fun main(args : Array<String>) {
+@Test fun runTest() {
     // Create outer link from cyclic garbage.
     val outer = Node(42, null, null, null)
     createCycles(outer)