[Patch-gnuradio] Fixing GRC Executable for OSes with Native Python >= 3.0

[Ben Hilburn]

This is a very simple / trivial fix.

For distros with a native Python version of at least 3.0, the current gnuradio-companion executable will default to failing because it can't find the gnuradio site-packages in the Python 3.0 site-packages.

This patch is a 3-character fix that makes 'env' explicitly return the executable to Python2.7.

Note that if we are still supporting users that use Python2.6, this will fail, and this patch should be ignored. If this is the case, I'll add a note to the Wiki about fixing the Python path for Python3 users.

Cheers,

Ben

grc_python_env_version.patch
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