* util/hostdisk.c (read_device_map): Use grub_util_get_disk_size
instead of stat in mingw environment.
* util/misc.c (grub_millisleep): Use Sleep in mingw environment.
* aclocal.m4 (grub_CHECK_LINK_DIR): New function.
* configure.ac: Use grub_CHECK_LINK_DIR to determine whether to use
AC_CONFIG_LINKS.
* util/hostdisk.c (open_device): Replace a grub_util_info() call
with grub_dprintf("hostdisk", ...), as it was so verbose that it
clobbered useful information.
