Added tests on lateinit properties

backend.native/tests/build.gradle

@@ -734,6 +734,16 @@ task propertyCallableReference_linkTest(type: LinkKonanTest) {
     lib = "codegen/propertyCallableReference/linkTest_lib.kt"
 }
 
+task lateinit_initialized(type: RunKonanTest) {
+    goldValue = "zzz\n"
+    source = "codegen/lateinit/initialized.kt"
+}
+
+task lateinit_notInitialized(type: RunKonanTest) {
+    goldValue = "OK\n"
+    source = "codegen/lateinit/notInitialized.kt"
+}
+
 task array0(type: RunKonanTest) {
     goldValue = "5\n6\n7\n8\n9\n10\n11\n12\n13\n"
     source = "runtime/collections/array0.kt"

backend.native/tests/codegen/lateinit/initialized.kt

@@ -0,0 +1,11 @@
+class A {
+    lateinit var s: String
+
+    fun foo() = s
+}
+
+fun main(args: Array<String>) {
+    val a = A()
+    a.s = "zzz"
+    println(a.foo())
+}

backend.native/tests/codegen/lateinit/notInitialized.kt

@@ -0,0 +1,17 @@
+class A {
+    lateinit var s: String
+
+    fun foo() = s
+}
+
+fun main(args: Array<String>) {
+    val a = A()
+    try {
+        println(a.foo())
+    }
+    catch (e: RuntimeException) {
+        println("OK")
+        return
+    }
+    println("Fail")
+}