squashfs-tools: enable building unsquashfs and fix squashfs-4.2-fix-CVE-2012-4025.patch
* build unsqaushfs, useful when debuging corrupt squashfs from
mksquashfs
* squashfs-4.2-fix-CVE-2012-4025.patch fixes CVE in unsquashfs which we
weren't building and it actually breaks building it, because someone
missed squashfs_fs.h change from the original change
* add git headers in all patches and fix references to new github
repository
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
