Windows: report AllocationSize in 1KB increments

Windows: report AllocationSize in 1KB increments

Windows expects storage to be allocated in increments of some
block size.  The AFS servers allocate in 1K units so lets report
that to Windows.

Reviewed-on: http://gerrit.openafs.org/11490
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
(cherry picked from commit d9ca3050c697a9d6b623be874ea46aaf2312ad87)

Change-Id: I0e2ad4680b94224e05a598372cdeac3e65fe148e
Reviewed-on: http://gerrit.openafs.org/11504
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>