Add a new buildbot-tool generator for master configs

scripts/tools/buildbot_tool_templates/master_site_config.py

Index: scripts/tools/buildbot_tool_templates/master_site_config.py
diff --git a/scripts/tools/buildbot_tool_templates/master_site_config.py b/scripts/tools/buildbot_tool_templates/master_site_config.py
new file mode 100644
index 0000000000000000000000000000000000000000..973c330a9c58e99e397ac86fc5e9419026d5d356
--- /dev/null
+++ b/scripts/tools/buildbot_tool_templates/master_site_config.py
@@ -0,0 +1,16 @@
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This file is used by scripts/tools/buildbot-tool to generate master configs.
+
+"""ActiveMaster definition."""
+
+from config_bootstrap import Master
+
+class %(master_classname)s(Master.%(master_base_class)s):
+  project_name = '%(master_classname)s'
+  master_port = %(master_port)s
+  slave_port = %(slave_port)s
+  master_port_alt = %(master_port_alt)s
+  buildbot_url = 'http://build.chromium.org/p/%(master_dirname)s/'