viced: time_t might not be long

Fix a couple of printf format errors that bite on FreeBSD 10 for i386.
Since time_t might be an int, it can't be printed with a long format.
Since time_t might be a long in general, cast to it to long when
printing.

Change-Id: Iecc4487adee7a64542dd2dc17f94485a6198e707
Reviewed-on: http://gerrit.openafs.org/11385
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>