Fix bug in isolate_lifecycle_test.

runtime/observatory/tests/service/isolate_lifecycle_test.dart

Index: runtime/observatory/tests/service/isolate_lifecycle_test.dart
diff --git a/runtime/observatory/tests/service/isolate_lifecycle_test.dart b/runtime/observatory/tests/service/isolate_lifecycle_test.dart
index a3ad5400f1b7d34e07427188fb744294b0db8a1b..f88b12323ec36ea12da6f4d0431bf87c73c84493 100644
--- a/runtime/observatory/tests/service/isolate_lifecycle_test.dart
+++ b/runtime/observatory/tests/service/isolate_lifecycle_test.dart
@@ -81,7 +81,7 @@ var tests = [
   (VM vm) async {
     Completer completer = new Completer();
     var stream = await vm.getEventStream(VM.kDebugStream);
-    if (numPaused(vm) < spawnCount) {
+    if (numPaused(vm) < (spawnCount + 1)) {
       var subscription;
       subscription = stream.listen((ServiceEvent event) {
         if (event.kind == ServiceEvent.kPauseExit) {