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

runtime/vm/debugger_api_impl_test.cc

 // Copyright (c) 2012, 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 "include/dart_debugger_api.h"
 #include "platform/assert.h"
 #include "vm/dart_api_impl.h"
 #include "vm/unit_test.h"
 
 namespace dart {
@@ skipping 47 matching lines @@
   Dart_ActivationFrame frame;
   Dart_Handle res = Dart_GetActivationFrame(trace, 0, &frame);
   EXPECT_VALID(res);
   Dart_Handle func_name;
   Dart_Handle url;
   intptr_t line_number = 0;
   intptr_t library_id = 0;
   res = Dart_ActivationFrameInfo(
             frame, &func_name, &url, &line_number, &library_id);
   EXPECT_VALID(res);
-  OS::SNPrint(info_str, sizeof(info_str), "function %s (%s:%d)",
+  OS::SNPrint(info_str, sizeof(info_str), "function %s (%s:%"Pd")",
               ToCString(func_name), ToCString(url), line_number);
   return info_str;
 }
 
 
 static void PrintValue(Dart_Handle value, bool expand);
 
 
 static void PrintObjectList(Dart_Handle list, const char* prefix, bool expand) {
   intptr_t list_length = 0;
@@ skipping 956 matching lines @@
   list_as_string = Dart_ToString(lib_list);
   list_cstr = "";
   EXPECT_VALID(Dart_StringToCString(list_as_string, &list_cstr));
   EXPECT_SUBSTRING(TestCase::url(), list_cstr);
 }
 
 
 #endif  // defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64).
 
 }  // namespace dart