Windows: Force rebuilding Freelance directory in AddMount and AddSymlink

Windows: Force rebuilding Freelance directory in AddMount and AddSymlink

cm_FreelanceAddMount and cm_FreelanceAddSymlink is supposed to
return the allocated FID of the entry that was added.  However,
cm_NameI is called to perform the lookup without forcing an update
of the Freelance fake directory.  As a result the entry may not be
found.

Force an update prior to calling cm_NameI() by using
cm_clearLocalMountPointChange() and cm_reInitLocalMountPoints()
if required.

LICENSE MIT

Change-Id: I08147b2ec61c810fdc718964362315af67d485b8
Reviewed-on: http://gerrit.openafs.org/1890
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
Tested-by: Jeffrey Altman <jaltman@openafs.org>