Move coroutines to kotlin.coroutines package: compiler

Generate continuation type as kotlin.coroutines.Continuaion. This code will
fail at runtime since there is no stdlib backing this change yet.
However, in order to generate compatible stdlib we need a compiler, which
generates continuation type as kotlin.coroutines.Continuation.
Thus, firstly we support the change in the compiler, make it bootstrap
compiler and only then change stdlib and tests accordingly.
 #KT-23362

idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/stubBuilder/TypeClsStubBuilder.kt

@@ -1,17 +1,6 @@
 /*
- * 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.
+ * 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 org.jetbrains.kotlin.idea.decompiler.stubBuilder
@@ -197,10 +186,14 @@ class TypeClsStubBuilder(private val c: ClsStubBuilderContext) {
                 if (parameterType.hasClassName() && parameterType.argumentCount == 1) {
                     val classId = c.nameResolver.getClassId(parameterType.className)
                     val fqName = classId.asSingleFqName()
-                    if (fqName == DescriptorUtils.CONTINUATION_INTERFACE_FQ_NAME) {
-                        suspendParameterType = parameterType
-                        continue
+                    assert(
+                        fqName == DescriptorUtils.CONTINUATION_INTERFACE_FQ_NAME_EXPERIMENTAL
+                                || fqName == DescriptorUtils.CONTINUATION_INTERFACE_FQ_NAME_RELEASE
+                    ) {
+                        "Last parameter type of suspend function must be Continuation, but it is $fqName"
                     }
+                    suspendParameterType = parameterType
+                    continue
                 }
             }
             val parameter = KotlinParameterStubImpl(