Commit

	06cb0670 time-wrs: implement time_set()

is changin the seconds leaving the fractional part alone. However, the
servo won't time-set again, but will rather converge, and this takes time.

We now adjust nanoseconds first, so the servo will still notice a
more-than-one-second error and will call our time-set again. Thus,
we jump to proper time in a few seconds instead of slowly converging from
far away.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>