Windows: pSrcObject instead of pSrcFcb->ObjectInformation

In AFSSetFileLinkInfo and AFSSetRenameInfo consistently use the
variable pSrcObject instead of pSrcFcb->ObjectInformation.  pSrcObject
is a local alias.  Mixing both forms in the same function is confusing.

Change-Id: I6b078d783389eb57ed5d36cbc463018e6199e17d
Reviewed-on: http://gerrit.openafs.org/9810
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Rod Widdowson <rdw@steadingsoftware.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>