JS: transform coroutines before serializing AST to binary format

js/js.translator/testData/box/incremental/coroutines.kt

@@ -0,0 +1,36 @@
+// FILE: a.kt
+// WITH_RUNTIME
+import kotlin.coroutines.experimental.*
+import kotlin.coroutines.experimental.intrinsics.*
+
+suspend fun suspendThere(v: String): String = suspendCoroutineOrReturn { x ->
+    x.resume(v)
+    COROUTINE_SUSPENDED
+}
+
+suspend fun suspendHere(): String = suspendThere("O") + suspendThere("K")
+
+// FILE: b.kt
+// RECOMPILE
+import kotlin.coroutines.experimental.*
+import kotlin.coroutines.experimental.intrinsics.*
+
+fun builder(c: suspend () -> Unit) {
+    c.startCoroutine(object : Continuation<Unit> {
+        override val context = EmptyCoroutineContext
+
+        override fun resume(result: Unit) {}
+
+        override fun resumeWithException(exception: Throwable) {}
+    })
+}
+
+fun box(): String {
+    var result = ""
+
+    builder {
+        result = suspendHere()
+    }
+
+    return result
+}