Tests for renamed fields

compiler/testData/codegen/box/fieldRename/simple.kt

@@ -0,0 +1,22 @@
+class A { }
+class B { }
+
+class Test {
+
+  public val A.prop: Int = 0;
+  public val B.prop: String = "1111";
+  public val prop: Double = 0.1;
+
+  public fun doTest() : String {
+      if (A().prop != 0) return "fail1"
+      if (B().prop != "1111") return "fail2"
+      if (prop != 0.1) return "fail3"
+
+      return "OK"
+  }
+}
+
+
+fun box() : String {
+  return Test().doTest()
+}