Correctly handle the --arch argument to dart test scripts.

tools/test.dart

Index: tools/test.dart
diff --git a/tools/test.dart b/tools/test.dart
index 6085999d0788367e92d686200db48c7a85cf301d..cf4fe84c5487dda08e1546dfbc14d9c4f4f957e0 100755
--- a/tools/test.dart
+++ b/tools/test.dart
@@ -35,6 +35,7 @@ main() {
   Map<String, RegExp> selectors = firstConf['selectors'];
   var maxProcesses = firstConf['tasks'];
   var progressIndicator = firstConf['progress'];
+  var verbose = firstConf['verbose'];
 
   var configurationIterator = configurations.iterator();
   bool enqueueConfiguration(ProcessQueue queue) {
@@ -95,6 +96,7 @@ main() {
   // Start process queue.
   var queue = new ProcessQueue(maxProcesses,
                                progressIndicator,
+                               verbose,
                                startTime,
                                enqueueConfiguration);
 }