Tests for renamed fields

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

@@ -0,0 +1,14 @@
+public class MPair<out A> (
+        public val first: A
+) {
+    fun equals(o: Any?): Boolean {
+        val t = o as MPair<*>
+        return first == t.first
+    }
+}
+
+fun box(): String {
+   val a = MPair("O")
+   a.equals(a)
+   return "OK"
+}