Added delegated property through map support + tests.

backend.native/tests/build.gradle

@@ -619,6 +619,20 @@ task delegatedProperty_delegatedOverride(type: LinkKonanTest) {
     lib = "codegen/delegatedProperty/delegatedOverride_lib.kt"
 }
 
+task delegatedProperty_lazy(type: RunKonanTest) {
+    goldValue = "computed!\nHello\nHello\n"
+    source = "codegen/delegatedProperty/lazy.kt"
+}
+
+task delegatedProperty_observable(type: RunKonanTest) {
+    goldValue = "<no name> -> first\nfirst -> second\n"
+    source = "codegen/delegatedProperty/observable.kt"
+}
+
+task delegatedProperty_map(type: RunKonanTest) {
+    goldValue = "John Doe\n25\n"
+    source = "codegen/delegatedProperty/map.kt"
+}
 
 task array0(type: RunKonanTest) {
     goldValue = "5\n6\n7\n8\n9\n10\n11\n12\n13\n"

backend.native/tests/codegen/delegatedProperty/lazy.kt

@@ -0,0 +1,9 @@
+val lazyValue: String by lazy {
+    println("computed!")
+    "Hello"
+}
+
+fun main(args: Array<String>) {
+    println(lazyValue)
+    println(lazyValue)
+}

backend.native/tests/codegen/delegatedProperty/map.kt

@@ -0,0 +1,13 @@
+class User(val map: Map<String, Any?>) {
+    val name: String by map
+    val age: Int     by map
+}
+
+fun main(args: Array<String>) {
+    val user = User(mapOf(
+            "name" to "John Doe",
+            "age"  to 25
+    ))
+    println(user.name) // Prints "John Doe"
+    println(user.age)  // Prints 25
+}

backend.native/tests/codegen/delegatedProperty/observable.kt

@@ -0,0 +1,14 @@
+import kotlin.properties.Delegates
+
+class User {
+    var name: String by Delegates.observable("<no name>") {
+        prop, old, new ->
+        println("$old -> $new")
+    }
+}
+
+fun main(args: Array<String>) {
+    val user = User()
+    user.name = "first"
+    user.name = "second"
+}