perf event: Introduce perf_event__fprintf

So that tools like 'perf test' can print the events when in verbose
mode, for instance.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-xnovdqfi25nc48gy6604k7yp@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index d8499e7..0d80201 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -2,6 +2,7 @@
 #define __PERF_RECORD_H
 
 #include <limits.h>
+#include <stdio.h>
 
 #include "../perf.h"
 #include "map.h"
@@ -199,4 +200,9 @@
 			     int sample_size, bool sample_id_all,
 			     struct perf_sample *sample, bool swapped);
 
+size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp);
+size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp);
+size_t perf_event__fprintf_task(union perf_event *event, FILE *fp);
+size_t perf_event__fprintf(union perf_event *event, FILE *fp);
+
 #endif /* __PERF_RECORD_H */