Don't hardcode Python path

Don't hardcode Python path

Instead of hardcoding /usr/bin/python, which might be set to point to
Python3 for many users, execute `/usr/bin/env python` in the she-bang;
users simply need to be instructed to make sure that this points to
Python2.

Committed: https://code.google.com/p/naclports/source/detail?r=713

[Ramkumar Ramachandra, 2013-03-14 09:19:56]

Hi,

Could you please review this simple change?  I ran into the issue while trying
to run build hterm with the ssh client [1].

Thanks.

[1]:
http://git.chromium.org/gitweb/?p=chromiumos/platform/assets.git;a=blob_plain...

[Sam Clegg, 2013-03-14 15:56:39]

LGTM, thanks!

Might be a good idea to also add these three lines to top of each file:

if sys.version_info < (2, 6, 0) || sys.version_info >= (3.0.0):
  sys.stderr.write("python version 2 (2.6 or later) is required to run this
script\n")
  sys.exit(1)

[artagnon_gmail.com, 2013-03-15 06:55:33]

Hi,

<sbc@chromium.org> wrote:
> LGTM, thanks!

Thanks, but I don't have commit access to check in the change: could
you check it in for me?  Alternatively, could you give me commit
access so I can check it in myself?

Thanks.

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[Sam Clegg, 2013-03-19 00:12:24]

Committed patchset #1 manually as r713 (presubmit successful).