Fix for KT-12200: initial property assignment ignored

#KT-12200 Fixed

compiler/testData/codegen/box/properties/kt12200.kt

@@ -0,0 +1,30 @@
+//WITH_RUNTIME
+
+class ThingTemplate {
+    val prop = 0
+}
+
+class ThingVal(template: ThingTemplate) {
+    val prop = template.prop
+}
+
+class ThingVar(template: ThingTemplate) {
+    var prop = template.prop
+}
+
+
+fun box() : String {
+    val template = ThingTemplate();
+    val javaClass = ThingTemplate::class.java
+    val field = javaClass.getDeclaredField("prop")!!
+    field.isAccessible = true
+    field.set(template, 1)
+
+    val thingVal = ThingVal(template)
+    if (thingVal.prop != 1) return "fail 1"
+
+    val thingVar = ThingVar(template)
+    if (thingVar.prop != 1) return "fail 2"
+
+    return "OK"
+}

compiler/testData/codegen/box/properties/kt12200Const.kt

@@ -0,0 +1,40 @@
+//WITH_RUNTIME
+//FULL_JDK
+//NOTE this test should be removed if Kotlin const properties will became inlined
+
+import java.lang.reflect.Field
+import java.lang.reflect.Modifier
+
+object ThingTemplate {
+    const val prop = 0
+}
+
+class ThingVal {
+    val prop = ThingTemplate.prop
+}
+
+class ThingVar {
+    var prop = ThingTemplate.prop
+}
+
+
+fun box() : String {
+    val template = ThingTemplate;
+    val javaClass = ThingTemplate::class.java
+    val field = javaClass.getDeclaredField("prop")!!
+    field.isAccessible = true
+
+    val modifiersField = Field::class.java!!.getDeclaredField("modifiers")
+    modifiersField.isAccessible = true
+    modifiersField.setInt(field, field.modifiers and Modifier.FINAL.inv())
+
+    field.set(null, 1)
+
+    val thingVal = ThingVal()
+    if (thingVal.prop != 1) return "fail 1"
+
+    val thingVar = ThingVar()
+    if (thingVar.prop != 1) return "fail 2"
+
+    return "OK"
+}