The scripts use argparse which is only in Python 3.2 onwards, so to avoid
failures on hosts using 3.0 or 3.1 just look for Python 2.
(From OE-Core rev: da889e86bac55178e06b6e2328ddf9415698fd79)
Signed-off-by: Gary Thomas <gary@mlbassoc.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>