Rename: Record new name for Kotlin function which is being renamed via light method

#KT-12732 Fixed
(cherry picked from commit 28b9d3e)

idea/src/org/jetbrains/kotlin/idea/refactoring/rename/RenameKotlinFunctionProcessor.kt

@@ -85,6 +85,9 @@ class RenameKotlinFunctionProcessor : RenameKotlinPsiProcessor() {
 
     override fun prepareRenaming(element: PsiElement, newName: String?, allRenames: MutableMap<PsiElement, String>, scope: SearchScope) {
         super.prepareRenaming(element, newName, allRenames, scope)
+        if (element is KtLightMethod && newName != null && getJvmName(element) == null) {
+            (element.kotlinOrigin as? KtNamedFunction)?.let { allRenames[it] = newName }
+        }
         val psiMethod = wrapPsiMethod(element)
         if (psiMethod?.containingClass != null) {
             javaMethodProcessorInstance.prepareRenaming(psiMethod, newName, allRenames, scope)