perf session: Extra logging for failed to process events

perf session: Extra logging for failed to process events

Print log information in ordered event processing so that the cause of
finished round failing is clearer. Print the event name along with its
number when an event isn't processed. Add extra detail about where the
failure happened.

The following log lines come from running `perf data convert`. Before:
  0xa250 [0x10]: failed to process type: 80

After:
  0xa250 [0x10]: piped event processing failed for event of type: FEATURE (80)

Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>