Introduce CoroutineImpl as a common super class for coroutines

The main benefit are class-files sizes for them
(not repeating the same declaration for each coroutine)
Also it helped to simplify coroutine codegen code a little

Note that controller/label field become non-volatile (see KT-14636)

 #KT-14636 In Progress

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

@@ -0,0 +1,40 @@
+/*
+ * 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
+
+abstract class CoroutineImpl(arity: Int) : Lambda(arity), Continuation<Any?> {
+    // It's not protected because can be used from noinline lambdas inside coroutine (when calling non-suspend functions)
+    // Also there might be needed a way to access a controller by Continuation instance when it's inherited from CoroutineImpl
+    @JvmField
+    var controller: Any? = null
+
+    // Any label state less then zero indicates that coroutine is not run and can't be resumed in any way.
+    // Specific values do not matter by now, but currently -2 used for uninitialized coroutine (no controller is assigned),
+    // and -1 will mean that coroutine execution is over (does not work yet).
+    @JvmField
+    protected var label: Int = -2
+
+    override fun resume(data: Any?) {
+        doResume(data, null)
+    }
+
+    override fun resumeWithException(exception: Throwable) {
+        doResume(null, exception)
+    }
+
+    protected abstract fun doResume(data: Any?, exception: Throwable?)
+}