perf evsel: Print branch filter state with -vv

Add a missing field to the perf_event_attr debug output.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/1445366797-30894-4-git-send-email-andi@firstfloor.org


[ Print it between config2 and sample_regs_user (peterz)]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>