Merge branch 'libblkid/ddf' of https://github.com/t-8ch/util-linux

* 'libblkid/ddf' of https://github.com/t-8ch/util-linux:
  libblkid: ddf_read: validate header checksum
  libc/crc32: make fill value of excluded area configurable
  libblkid: ddf_raid: drop little-endian handling
  libblkid: ddf_raid: respect constness of buffer