Add attributions so printf like functions can have their arguments checked.

runtime/vm/timer.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/timer.h"
 
 namespace dart {
 
 // Define timer command line flags.
 #define DEFINE_TIMER_FLAG(name, msg)                                           \
   DEFINE_FLAG(bool, name, false, ""#name);
 TIMER_LIST(DEFINE_TIMER_FLAG)
 #undef DEFINE_TIMER_FLAG
 DEFINE_FLAG(bool, time_all, false, "Time all functionality");
 
 
 // Maintains a list of timers per isolate.
 #define INIT_TIMERS(name, msg)                                                 \
   name##_((FLAG_##name || FLAG_time_all), msg),
 TimerList::TimerList()
     : TIMER_LIST(INIT_TIMERS)
       padding_(false) {
 }
 #undef INIT_TIMERS
 
 
 #define TIMER_FIELD_REPORT(name, msg)                                          \
   if (name().enabled() && name().message() != NULL) {                          \
-    OS::Print("%s %ld micros.\n", name().message(), name().TotalElapsedTime());\
+    OS::Print("%s %"Pd64" micros.\n",                                          \
+              name().message(),                                                \
+              name().TotalElapsedTime());                                      \
   }
 void TimerList::ReportTimers() {
   TIMER_LIST(TIMER_FIELD_REPORT);
 }
 #undef TIMER_FIELD_REPORT
 
 }  // namespace dart