Need add python3-git to buildtools-tarball for the py3 build. (From OE-Core rev: fa19a541deb46dec1f4fbd60f08584daa06e2d6b) Signed-off-by: Robert Yang <liezhi.yang@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>