Refine coroutine/suspend functions ABI

- `invoke` method must always start a suspend functions
- For creation of coroutine that has not been started yet, there are
two special internal interfaces `SuspendFunction0`/`SuspendFunction1`

core/runtime.jvm/src/kotlin/jvm/internal/SuspendFunctions.kt

@@ -0,0 +1,27 @@
+/*
+ * 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.
+ */
+
+package kotlin.jvm.internal
+
+import kotlin.coroutines.Continuation
+
+interface SuspendFunction0<out R> {
+    fun create(resultingContinuation: Continuation<R>): Continuation<Unit>
+}
+
+interface SuspendFunction1<in T, out R> {
+    fun create(value: T, resultingContinuation: Continuation<R>): Continuation<Unit>
+}