perf stat: Move sw clock metrics printout to stat-shadow

The sw clock metrics printing was missed in the earlier move to
stat-shadow of all the other metric printouts. Move it too.

v2: Fix metrics printing in this version to make bisect safe.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/1446515428-7450-2-git-send-email-andi@firstfloor.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>