Implement copy methods for anonymous and enum entry light classes

compiler/light-classes/src/org/jetbrains/kotlin/asJava/KtLightClassForAnonymousDeclaration.kt

@@ -111,6 +111,8 @@ internal open class KtLightClassForAnonymousDeclaration(name: FqName,
     override fun getTypeParameterList() = null
     override fun isEnum() = false
 
+    override fun copy(): PsiElement = KtLightClassForAnonymousDeclaration(classFqName, classOrObject)
+
     companion object {
         private val LOG = Logger.getInstance(KtLightClassForAnonymousDeclaration::class.java)
     }

compiler/light-classes/src/org/jetbrains/kotlin/asJava/KtLightClassForEnumEntry.kt

@@ -27,4 +27,5 @@ internal class KtLightClassForEnumEntry(
         private val enumConstant: PsiEnumConstant
 ): KtLightClassForAnonymousDeclaration(fqName, enumEntry), PsiEnumConstantInitializer {
     override fun getEnumConstant(): PsiEnumConstant = enumConstant
+    override fun copy() = KtLightClassForEnumEntry(classFqName, classOrObject as KtEnumEntry, enumConstant)
 }