Update test and status file for precompiler.

tests/language/arg_param_trailing_comma_test.dart

Index: tests/language/arg_param_trailing_comma_test.dart
diff --git a/tests/language/arg_param_trailing_comma_test.dart b/tests/language/arg_param_trailing_comma_test.dart
index 5c2c42a43ab2c3b45e923cc99bc88ea2d07e8ff4..a4a0d3c902ce5798f15ae364dfe71fbfe65c0e4f 100644
--- a/tests/language/arg_param_trailing_comma_test.dart
+++ b/tests/language/arg_param_trailing_comma_test.dart
@@ -75,7 +75,9 @@ class C {
   operator []=(x, y, ) {}                             /// none: continued
 }
 
-main(args, ) {
+main(args
+    ,                                                 /// none: continued
+    ) {
   testCalls();                                        /// none: continued
   // Make sure the Bad class is checked.
   new Bad().method();