squashfs: update site to git.kernel.org
squashfs-tools development has been moved to git.kernel.org from
Sourceforge.
The hash was selected to fix a threading issue observed when
creating images on a build machine with at least 64 cores.
(Fixes random corrupted images that would fail to boot)
Signed-off-by: Atul Singh <atul.singh.mandla@rockwellcollins.com>
Signed-off-by: Matt Weber <matthew.weber@rockwellcollins.com>
[Thomas: use https:// instead of git://.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>