Add basic iterators. (#58)

backend.native/tests/build.gradle

@@ -373,3 +373,7 @@ task link(type: LinkKonanTest) {
     lib = "link/lib"
 } */
 
+task for0(type: RunKonanTest) {
+    goldValue = "2\n3\n4\n"
+    source = "runtime/basic/for0.kt"
+}

backend.native/tests/runtime/basic/for0.kt

@@ -0,0 +1,9 @@
+fun main(args : Array<String>) {
+    val byteArray = ByteArray(3)
+    byteArray[0] = 2
+    byteArray[1] = 3
+    byteArray[2] = 4
+    for (item in byteArray) {
+        println(item)
+    }
+}