Merge changes Ia1d8fa93,I8434508e,I4beb9865,Ib80360ce

* changes:
  simpleperf: disable child inherit in system wide collection.
  simpleperf: add --add-counter in record cmd.
  simpleperf: use ioctl to get event fd id.
  simpleperf: parse PERF_SAMPLE_READ field in SampleRecord.