update to newer libbase

BUG=chromium-os:25872
TEST=`emerge-x86-alex crash-reporter` works
TEST=`cros_run_unit_tests --board=x86-alex -p crash-reporter` passed

Change-Id: Iff428b1364f96533d2d2290272823c2c84c48933
Reviewed-on: https://gerrit.chromium.org/gerrit/20008
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/crash_reporter/user_collector.cc b/crash_reporter/user_collector.cc
index 28c5ce6..b060bd6 100644
--- a/crash_reporter/user_collector.cc
+++ b/crash_reporter/user_collector.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -19,6 +19,7 @@
 #include "base/logging.h"
 #include "base/string_split.h"
 #include "base/string_util.h"
+#include "base/stringprintf.h"
 #include "chromeos/process.h"
 #include "chromeos/syslog_logging.h"
 #include "gflags/gflags.h"