perf intel-pt: Time filter logged perf events

Change the debug logging (when used with the --time option) to time
filter logged perf events, but allow that to be overridden by using
"d+a" instead of plain "d".

That can reduce the size of the log file.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/20200710151104.15137-10-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>