allow renaming functions which are members of anonymous objects

#KT-5857 Fixed

idea/testData/refactoring/rename/simpleNameReference/localFunction.kt

@@ -0,0 +1,16 @@
+class X {
+    fun fn() : Iterator<String> = object : Iterator<String> {
+        override fun next(): String {
+            dddd()
+            return ""
+        }
+
+        override fun hasNext(): Boolean {
+            return false
+        }
+
+        fun dd<caret>dd() { // try renaming this function
+
+        }
+    }
+}