libude: remove special handling of "device" link, it should not be used
libudev: avoid potential misaligned accesses

clang reports:
  src/libudev/libudev-util.c:665:35: warning: cast from
  "const unsigned char *" to "unsigned int *" increases required alignment
  from 1 to 4 [-Wcast-align]
build-sys: fix typo in human-readable output