reading properties info from binary classes

Add final modifier to val backing field

compiler/testData/readClass/prop/ClassVal.kt

@@ -0,0 +1,5 @@
+package test
+
+class ClassVal() {
+    val aa = 1
+}

compiler/testData/readClass/prop/ClassVar.kt

@@ -0,0 +1,5 @@
+package test
+
+class ClassVar() {
+    var aa = 1
+}

compiler/testData/readClass/prop/NsVal.kt

@@ -0,0 +1,3 @@
+package test
+
+val nsVal = 1

compiler/testData/readClass/prop/NsVar.kt

@@ -0,0 +1,3 @@
+package test
+
+var nsVal = 1