Add JSON metrics for Haswell EP.
Signed-off-by: NAndi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20170908180133.GA20128@tassilo.jf.intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>