Add possibility to specify supertypes for script, with tests

compiler/tests/org/jetbrains/kotlin/scripts/TestScriptDsl.kt

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2010-2016 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.
+ */
+
+@file:Suppress("unused")
+
+package org.jetbrains.kotlin.scripts
+
+open class TestDSLClass
+
+fun TestDSLClass.fibCombine(f: (Int) -> Int, n: Int) = if (n < 2) 1 else f(n - 1) + f(n - 2)
+
+interface TestDSLInterface
+
+fun TestDSLInterface.fibCombine(f: (Int) -> Int, n: Int) = if (n < 2) 1 else f(n - 1) + f(n - 2)
+