use correct format types

Signed-off-by: Anthony G. Basile <blueness@gentoo.org>
udev-builtin-btrfs: properly initialize ioctl struct to zeroes

Signed-off-by: Anthony G. Basile <blueness@gentoo.org>
blkid: Warn when rejecting a superblock with a bad csum

Bump libblkid requirement from 2.20 to 2.24.
util-linux 2.25 is actually required since fdbbad981cc5da8bb4ed7e9b6646e7a114745ec5

Signed-off-by: Anthony G. Basile <blueness@gentoo.org>