1.2.6 is no more fetchable and 1.2.7 fix some bugs, full changelog is
available here : http://zlib.net/ChangeLog.txt
(From OE-Core rev: 2f071e32128d8c022277c8af72dae47f60cf212b)
Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>