Implemented 'lateinit' properties

If property is lateinit, then on each access we need to test its value
and throw UninitializedPropertyAccessException if it is null.

runtime/src/main/kotlin/konan/internal/RuntimeUtils.kt

@@ -24,6 +24,10 @@ fun ThrowNoWhenBranchMatchedException(): Nothing {
     throw NoWhenBranchMatchedException()
 }
 
+fun ThrowUninitializedPropertyAccessException(): Nothing {
+    throw UninitializedPropertyAccessException()
+}
+
 @ExportForCppRuntime
 internal fun TheEmptyString() = ""
 

runtime/src/main/kotlin/kotlin/Exceptions.kt

@@ -176,6 +176,15 @@ public open class NoWhenBranchMatchedException : RuntimeException {
     }
 }
 
+public open class UninitializedPropertyAccessException : RuntimeException {
+
+    constructor() : super() {
+    }
+
+    constructor(s: String) : super(s) {
+    }
+}
+
 public open class OutOfMemoryError : Error {
 
     constructor() : super() {