xstat: cm xstat time values are 32 bit

xstat: cm xstat time values are 32 bit

The kernel space cm xstat time structures are implemented as 32
bit values in memory and on the wire.  Define the client side
xstat userspace structures as 32 bit time values as well to avoid
size mismatches on systems with native 64 bit time values.

Reviewed-on: http://gerrit.openafs.org/5237
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
Reviewed-by: Derrick Brashear <shadow@dementix.org>
(cherry picked from commit 130144850c6d05bc69e06257a5d7219eb98697d8)

Change-Id: I8726efdd7123e9a1e0e4536bf2766c441964475d
Reviewed-on: http://gerrit.openafs.org/6386
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementix.org>