Add tag write access to merge script.

tools/push-to-trunk/test_scripts.py

 #!/usr/bin/env python
 # Copyright 2013 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
@@ skipping 1254 matching lines @@
       RL("Y"),  # Automatically increment patch level?
       Cmd("git commit -aF \"%s\"" % TEST_CONFIG["COMMITMSG_FILE"], ""),
       RL("reviewer@chromium.org"),  # V8 reviewer.
       Cmd("git cl upload --send-mail -r \"reviewer@chromium.org\" "
           "--bypass-hooks --cc \"ulan@chromium.org\"", ""),
       Cmd("git checkout -f %s" % TEST_CONFIG["BRANCHNAME"], ""),
       RL("LGTM"),  # Enter LGTM for V8 CL.
       Cmd("git cl presubmit", "Presubmit successfull\n"),
       Cmd("git cl dcommit -f --bypass-hooks", "Closing issue\n",
           cb=VerifySVNCommit),
-      Cmd("git svn tag 3.22.5.1 -m \"Tagging version 3.22.5.1\"", ""),
+      Cmd("git tag 3.22.5.1", ""),
+      Cmd("git push origin 3.22.5.1", ""),

[Michael Achenbach, 2014/09/26 14:11:52]

Pushing the tag might take over the git updater from the dcommit above by a few
seconds. Is that a problem?

       Cmd("git checkout -f some_branch", ""),
       Cmd("git branch -D %s" % TEST_CONFIG["BRANCHNAME"], ""),
     ])
 
     # r12345 and r34567 are patches. r23456 (included) and r45678 are the MIPS
     # ports of r12345. r56789 is the MIPS port of r34567.
     args = ["-f", "-p", extra_patch, "--branch", "candidates",
             "--vc-interface", "git_read_svn_write", "12345", "23456", "34567"]
 
     # The first run of the script stops because of the svn being down.
@@ skipping 379 matching lines @@
 
 Review URL: https://codereview.chromium.org/83173002
 
 ------------------------------------------------------------------------""")
     self.assertEquals(
 """Prepare push to trunk.  Now working on version 3.23.11.
 
 R=danno@chromium.org
 
 Committed: https://code.google.com/p/v8/source/detail?r=17997""", body)