Windows: buf_CleanLocked no callback for deleted file

If the cm_scache flags indicate the object is CM_SCACHEFLAG_DELETED,
do not request a callback.  Simply invalidate the data in the buffer
and move on.

Change-Id: Id461dc20dda53c93eb87f2648f6279877e4a34d6
Reviewed-on: http://gerrit.openafs.org/10139
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Windows: CM_SCACHEFLAG_DELETED use InterlockedOr

When setting CM_SCACHEFLAG_DELETED use InterlockedOr.

Change-Id: Ie6ccc8e0a167e5bb6a8b74689606166821168989
Reviewed-on: http://gerrit.openafs.org/10140
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>