Fix git cl upload --squash (for Gerrit).

Fix git cl upload --squash (for Gerrit).

R=bauerb@chromium.org,andybons@chromium.org
BUG=

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=298270

[tandrii(chromium), 2016-01-14 14:59:53]

PTAL

without this the os.close fails with invalid handle like:

Traceback (most recent call last):
  File "/usr/local/google/home/tandrii/bin/depot_tools/git_cl.py", line 3720, in
<module>
    sys.exit(main(sys.argv[1:]))
  File "/usr/local/google/home/tandrii/bin/depot_tools/git_cl.py", line 3702, in
main
    return dispatcher.execute(OptionParser(), argv)
  File "/usr/local/google/home/tandrii/bin/depot_tools/subcommand.py", line 252,
in execute
    return command(parser, args[1:])
  File "/usr/local/google/home/tandrii/bin/depot_tools/git_cl.py", line 2462, in
CMDupload
    return GerritUpload(options, args, cl, change)
  File "/usr/local/google/home/tandrii/bin/depot_tools/git_cl.py", line 2037, in
GerritUpload
    os.close(file_handle)
OSError: [Errno 9] Bad file descriptor
Sending crash report ...
  args: ['/usr/local/google/home/tandrii/bin/depot_tools/git_cl.py', 'upload']
  cwd: /usr/local/google/home/tandrii/s/tmp/cq/normal
  exception: [Errno 9] Bad file descriptor
  host: andrii.muc.corp.google.com
  stack:   File "/usr/local/google/home/tandrii/bin/depot_t
  user: tandrii
  version: 2.7.6 (default, Jun 22 2015, 17:58:13) 
[GCC 4.8.2
A stack trace has been sent to the maintainers.

[Bernhard Bauer, 2016-01-14 15:53:36]

Ugh. Thanks for this fix! LGTM

[Bons, 2016-01-14 15:58:45]

lgtm

[tandrii(chromium), 2016-01-14 15:59:19]

The CQ bit was checked by tandrii@chromium.org

[commit-bot: I haz the power, 2016-01-14 15:59:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1590473002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1590473002/1

[commit-bot: I haz the power, 2016-01-14 16:01:01]

Description was changed from

==========
Fix git cl upload --squash (for Gerrit).

R=bauerb@chromium.org,andybons@chromium.org
BUG=
==========

to

==========
Fix git cl upload --squash (for Gerrit).

R=bauerb@chromium.org,andybons@chromium.org
BUG=

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=298270
==========

[commit-bot: I haz the power, 2016-01-14 16:01:02]

Committed patchset #1 (id:1) as
http://src.chromium.org/viewvc/chrome?view=rev&revision=298270