dtrace: ensure new SDT info generation works on sparc64

dtrace: ensure new SDT info generation works on sparc64

Due to addresses on sparc64 being in the lower range of the memory map, the
calculated addresses for SDT probe points were represented with less hex
characters then their function base address counterparts (obtained from
objdump output).  This messed up the sorting based on address values, and
resulted in all probe points being associated with the last function in the
list.

This commit ensures that all addresses are 16 hex characters long.

Orabug: 24655168

Signed-off-by: Kris Van Hees <kris.van.hees@oracle.com>
Acked-by: Nick Alcock <nick.alcock@oracle.com>