Since we know that github archives which are automatically generated have a
tendency to change their checksums[1], switch to using a git clone.
[1] http://lists.openembedded.org/pipermail/openembedded-devel/2017-September/114916.html
Signed-off-by: Trevor Woerner <twoerner@gmail.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
(cherry picked from commit c2404f15b85a8114b9e9753b594b0a1be4c09f2b)
Signed-off-by: Armin Kuster <akuster808@gmail.com>