Switch sourcesets of experimental and release coroutines

- Move experimental coroutines out of the main source root.
- Include experimental coroutines into the coroutines source set.
- Include release coroutines into the main source set.

libraries/stdlib/common/src/kotlin/CoroutinesExperimentalH.kt

@@ -1,21 +0,0 @@
-/*
- * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
- * that can be found in the license/LICENSE.txt file.
- */
-
-package kotlin.coroutines.experimental
-
-@PublishedApi
-internal expect class SafeContinuation<in T> : Continuation<T> {
-    internal constructor(delegate: Continuation<T>, initialResult: Any?)
-
-    @PublishedApi
-    internal constructor(delegate: Continuation<T>)
-
-    @PublishedApi
-    internal fun getResult(): Any?
-
-    override val context: CoroutineContext
-    override fun resume(value: T): Unit
-    override fun resumeWithException(exception: Throwable): Unit
-}

libraries/stdlib/common/src/kotlin/CoroutinesIntrinsicsExperimentalH.kt

@@ -1,44 +0,0 @@
-/*
- * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
- * that can be found in the license/LICENSE.txt file.
- */
-
-package kotlin.coroutines.experimental.intrinsics
-
-import kotlin.coroutines.experimental.Continuation
-
-/**
- * Starts unintercepted coroutine without receiver and with result type [T] and executes it until its first suspension.
- * Returns the result of the coroutine or throws its exception if it does not suspend or [COROUTINE_SUSPENDED] if it suspends.
- * In the later case, the [completion] continuation is invoked when coroutine completes with result or exception.
- * This function is designed to be used from inside of [suspendCoroutineOrReturn] to resume the execution of suspended
- * coroutine using a reference to the suspending function.
- */
-@SinceKotlin("1.1")
-public expect inline fun <T> (suspend () -> T).startCoroutineUninterceptedOrReturn(
-    completion: Continuation<T>
-): Any?
-
-/**
- * Starts unintercepted coroutine with receiver type [R] and result type [T] and executes it until its first suspension.
- * Returns the result of the coroutine or throws its exception if it does not suspend or [COROUTINE_SUSPENDED] if it suspends.
- * In the later case, the [completion] continuation is invoked when coroutine completes with result or exception.
- * This function is designed to be used from inside of [suspendCoroutineOrReturn] to resume the execution of suspended
- * coroutine using a reference to the suspending function.
- */
-@SinceKotlin("1.1")
-public expect inline fun <R, T> (suspend R.() -> T).startCoroutineUninterceptedOrReturn(
-    receiver: R,
-    completion: Continuation<T>
-): Any?
-
-@SinceKotlin("1.1")
-public expect fun <T> (suspend () -> T).createCoroutineUnchecked(
-    completion: Continuation<T>
-): Continuation<Unit>
-
-@SinceKotlin("1.1")
-public expect fun <R, T> (suspend R.() -> T).createCoroutineUnchecked(
-    receiver: R,
-    completion: Continuation<T>
-): Continuation<Unit>