Restore deprecated K*Function classes for compatibility

The code compiled with old compiler will work with the new runtime, but not
vice versa

core/builtins/src/kotlin/reflect/_Deprecated.kt

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2010-2015 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package kotlin.reflect
+
+@deprecated("This class will be dropped in M13 because it was a part of an overly complex API. Use KFunction instead")
+public interface KTopLevelFunction<out R> : KFunction<R>
+
+@deprecated("This class will be dropped in M13 because it was a part of an overly complex API. Use KFunction instead")
+public interface KTopLevelExtensionFunction<in E, out R>
+
+@deprecated("This class will be dropped in M13 because it was a part of an overly complex API. Use KFunction instead")
+public interface KMemberFunction<in T, out R> : KFunction<R>
+
+@deprecated("This class will be dropped in M13 because it was a part of an overly complex API. Use KFunction instead")
+public interface KLocalFunction<out R> : KFunction<R>

core/reflection.jvm/src/kotlin/reflect/jvm/internal/KFunctionImpl.kt

@@ -18,17 +18,18 @@ package kotlin.reflect.jvm.internal
 
 import org.jetbrains.kotlin.descriptors.FunctionDescriptor
 import kotlin.jvm.internal.FunctionImpl
-import kotlin.reflect.KFunction
+import kotlin.reflect.*
 
 open class KFunctionImpl protected constructor(
         container: KCallableContainerImpl,
         name: String,
         signature: String,
         descriptorInitialValue: FunctionDescriptor?
-) : KFunction<Any?>, FunctionImpl() {
-    constructor(container: KCallableContainerImpl, name: String, signature: String): this(container, name, signature, null)
+) : KFunction<Any?>, FunctionImpl(),
+        KLocalFunction<Any?>, KMemberFunction<Any, Any?>, KTopLevelExtensionFunction<Any?, Any?>, KTopLevelFunction<Any?> {
+    constructor(container: KCallableContainerImpl, name: String, signature: String) : this(container, name, signature, null)
 
-    constructor(container: KCallableContainerImpl, descriptor: FunctionDescriptor): this(
+    constructor(container: KCallableContainerImpl, descriptor: FunctionDescriptor) : this(
             container, descriptor.getName().asString(), RuntimeTypeMapper.mapSignature(descriptor), descriptor
     )
 

core/runtime.jvm/src/kotlin/jvm/internal/FunctionReference.java

@@ -17,10 +17,16 @@
 package kotlin.jvm.internal;
 
 import kotlin.jvm.KotlinReflectionNotSupportedError;
-import kotlin.reflect.KDeclarationContainer;
-import kotlin.reflect.KFunction;
+import kotlin.reflect.*;
 
-public class FunctionReference extends FunctionImpl implements KFunction {
+@SuppressWarnings("deprecation")
+public class FunctionReference
+        extends FunctionImpl
+        implements KFunction,
+                   KTopLevelFunction,
+                   KMemberFunction,
+                   KTopLevelExtensionFunction,
+                   KLocalFunction {
     private final int arity;
 
     public FunctionReference(int arity) {