[Buildbot] #2883: `python setup.py bdist_wheel` produces an empty package

[Buildbot trac]

#2883: `python setup.py bdist_wheel` produces an empty package
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Reporter:  dustin  |       Owner:  dustin
    Type:  defect  |      Status:  assigned
Priority:  major   |   Milestone:  0.9.0
 Version:  0.8.9   |  Resolution:
Keywords:  pkg     |
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Comment (by dustin):

 Nope, unfortunately that temporary `install_lib` is only set after
 `bdist_wheel` begins -- it calls `reinitialize_command('install')` and
 then sets its subdirs.

 I suspect that the `build_js` part of `buildbot_pkg` can stay where it is,
 but that the `copy_tree` should be moved to an override of `install_lib`
 instead.  So that's what I did:
   https://github.com/buildbot/buildbot/pull/1215

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Ticket URL: <http://trac.buildbot.net/ticket/2883#comment:5>
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