We're finding bugs in python 2.6 and starting to require unittest
functionality in python 2.7.x. Its time to bump the minimum version
requirement. Anyone without python 2.7.x can use the buildtools-tarball
out to install a standalone python/git/tar setup which will work
with the system.
(From OE-Core rev: 8b90f1becd40a7f857d2fbe30eaffe218a976419)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>