Implement basic support for coroutines in JVM backend

compiler/testData/compileKotlinAgainstKotlin/coroutinesBinary.kt

@@ -0,0 +1,24 @@
+// FILE: A.kt
+package a
+class Controller {
+    suspend fun suspendHere(x: Continuation<String>) {
+        x.resume("OK")
+    }
+}
+
+fun builder(coroutine c: Controller.() -> Continuation<Unit>) {
+    c(Controller()).resume(Unit)
+}
+
+// FILE: B.kt
+import a.builder
+
+fun box(): String {
+    var result = ""
+
+    builder {
+        result = suspendHere()
+    }
+
+    return result
+}