perf tools: Rename 'struct sample_data' to 'struct perf_sample'

Making the namespace more uniform.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-test.c b/tools/perf/builtin-test.c
index 738830d..df62433 100644
--- a/tools/perf/builtin-test.c
+++ b/tools/perf/builtin-test.c
@@ -550,7 +550,7 @@
 		}
 
 	while ((event = perf_evlist__read_on_cpu(evlist, 0)) != NULL) {
-		struct sample_data sample;
+		struct perf_sample sample;
 
 		if (event->header.type != PERF_RECORD_SAMPLE) {
 			pr_debug("unexpected %s event\n",