BC native tests port to Konan's TestRunner

backend.native/tests/codegen/cycles/cycle.kt

@@ -1,3 +1,7 @@
+package codegen.cycles.cycle
+
+import kotlin.test.*
+
 fun cycle(cnt: Int): Int {
   var sum = 1
   while (sum == cnt) {
@@ -6,7 +10,7 @@ fun cycle(cnt: Int): Int {
   return sum
 }
 
-fun main(args: Array<String>) {
+@Test fun runTest() {
   if (cycle(1) != 2) throw Error()
   if (cycle(0) != 1) throw Error()
 }

backend.native/tests/codegen/cycles/cycle_do.kt

@@ -1,3 +1,7 @@
+package codegen.cycles.cycle_do
+
+import kotlin.test.*
+
 fun cycle_do(cnt: Int): Int {
   var sum = 1
   do {
@@ -6,7 +10,7 @@ fun cycle_do(cnt: Int): Int {
   return sum
 }
 
-fun main(args: Array<String>) {
+@Test fun runTest() {
   if (cycle_do(3) != 5) throw Error()
   if (cycle_do(0) != 3) throw Error()
 }

backend.native/tests/codegen/cycles/cycle_for.kt

@@ -1,3 +1,7 @@
+package codegen.cycles.cycle_for
+
+import kotlin.test.*
+
 fun cycle_for(arr: Array<Int>) : Int {
   var sum = 0
   for (i in arr) {
@@ -5,3 +9,7 @@ fun cycle_for(arr: Array<Int>) : Int {
   }
   return sum
 }
+
+@Test fun main() {
+  if (cycle_for(Array(4, init = { it })) != 6) throw Error()
+}