Fix crash in gnulib-tool.py under Python 2.6 and lower

[Darshit Shah]

gnulib-tool.py will currently crash immediately on start if the underlying
Python version is 2.6 or lower. The immediate crash that is seen occurs during
the check for the Python version. The check uses a syntax which was only
introduced in 2.7. I haven't checked, but I believe that the rest of the script
also uses 2.7+ syntax. Hence, I have also added a check to the script to exit
out if the version of Python being used is less than 2.7.


-- 
Thanking You,
Darshit Shah
PGP Fingerprint: 7845 120B 07CB D8D6 ECE5 FF2B 2A17 43ED A91A 35B6

0002-pygnulib-Don-t-crash-immediately-on-older-Python-ver.patch
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