dtrace: fix cyclic allocation

dtrace: fix cyclic allocation

Fixed the allocation of cyclics that was the cause of some obscure crashes
during the testsuite execution.  Problem was that cyclics were being allocated
in chunks, with a new array being allocated as (prev-size + chink-size), and
then the old entries being copied over.  However, because the hrtimer struct is
embedded in the cyclic struct, this meant that hrtimer structs were being moved
outside the hrtimer code.

Signed-off-by: Kris Van Hees <kris.van.hees@oracle.com>