The expiry time for relative timers with SIGEV_NONE set was never
updated to the correct value.

Pointed out by George Anzinger.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>