Adding Python 2.7 to linux-c7

[Zhihao Yuan]

Hi, linuxulator folks,

Please review lang/linux-c7-python

  https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=223579

The motivation is that some Python software ship Linux-
specific binaries, and we want to enable the uses.  A follow-
up question is that how we deal with the existing Python
modules with binaries in the CentOS 7 repos.  Do we
encourage to create an all-in-one port to install them all,
or add them when requested?

Thanks.

-- 
Zhihao Yuan, ID lichray
The best way to predict the future is to invent it.
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