Fix PEXBuilder.clone.

[jsirois]

Previously neither shebang nor copy were cloned leading to inability to
set these attributes differently from their defaults using bdist_pex
which leverages clone.

[jsirois]

@salimfadhley - if you can review this PR I'd appreciate it.

[jsirois]

This addresses #233

[salimfadhley]

I can have a go at testing this on Monday if you like. :-)

[jsirois]

That would be great. I tested it for your use case on the command line as well. A code review would be welcome too.

[jsirois]

@salimfadhley I'll submit this tomorrow if I don't here back from you.

[salimfadhley]

Hey - thanks for doing this. It's hard for me to test source at work. It
would be best for you to merge it in and then i can pull the packages and
re-test everything.

On Tue, 19 Apr 2016 at 21:52 John Sirois [email protected] wrote:

@salimfadhley https://github.com/salimfadhley I'll submit this tomorrow
if I don't here back from you.

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#234 (comment)

[jsirois]

Sounds good @salimfadhley, patched in @ 2fc3f73