libperf: Add PERF_RECORD_STAT_CONFIG 'struct stat_config_event' to perf/event.h

Move the PERF_RECORD_STAT_CONFIG event definition to libperf's event.h.

In order to keep libperf simple, we switch 'u64/u32/u16/u8' types used
events to their generic '__u*' versions.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190828135717.7245-16-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index b048e60..b711019 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -1235,7 +1235,7 @@ void perf_event__read_stat_config(struct perf_stat_config *config,
 		CASE(INTERVAL,  interval)
 #undef CASE
 		default:
-			pr_warning("unknown stat config term %" PRIu64 "\n",
+			pr_warning("unknown stat config term %" PRI_lu64 "\n",
 				   event->data[i].tag);
 		}
 	}