JS: Fixed lateinit property initialization

js/js.translator/testData/box/initialize/lateinit.kt

@@ -0,0 +1,17 @@
+class Greeting {
+    val noon = xrun {
+        verb = "Hello"
+        "World"
+    }
+
+    lateinit var verb: String
+
+    fun greet() = "$verb $noon"
+}
+
+fun <T> xrun(body: () -> T) = body()
+
+fun box(): String {
+    if (Greeting().greet() != "Hello World") return "fail"
+    return "OK"
+}