libperf: Add PERF_RECORD_COMM 'struct comm_event' to perf/event.h

Moving comm_event event definition into libperf's event.h
header include.

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/20190825181752.722-4-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/lib/include/perf/event.h

@@ -30,4 +30,10 @@ struct mmap2_event {
 	char			 filename[PATH_MAX];
 };
 
+struct comm_event {
+	struct perf_event_header header;
+	__u32			 pid, tid;
+	char			 comm[16];
+};
+
 #endif /* __LIBPERF_EVENT_H */

tools/perf/util/event.h

@@ -27,12 +27,6 @@
 #define PRI_lx64 PRIx64
 #endif
 
-struct comm_event {
-	struct perf_event_header header;
-	u32 pid, tid;
-	char comm[16];
-};
-
 struct namespaces_event {
 	struct perf_event_header header;
 	u32 pid, tid;