Windows: EvalByName pass LastComponent flag

Windows: EvalByName pass LastComponent flag

Add AFS_REQUEST_FLAG_LAST_COMPONENT flag for use with
AFS_REQUEST_TYPE_EVAL_TARGET_BY_NAME requests to the service.
When set the service will perform cm_Lookup calls without the
CM_FLAG_CHECKPATH flag set.

Change-Id: I47ec2fb8b1e2699f2d87a6625b1db549ecb4e03d
Reviewed-on: http://gerrit.openafs.org/9133
Reviewed-by: Peter Scott <pscott@kerneldrivers.com>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>