perf test: Add 'struct test *' to the test functions

This way we'll be able to pass more test specific parameters without
having to change this function signature.

Will be used by the upcoming 'shell tests', shell scripts that will
call perf tools and check if they work as expected, comparing its
effects on the system (think 'perf probe foo') the output produced, etc.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Thomas Richter <tmricht@linux.vnet.ibm.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-wq250w7j1opbzyiynozuajbl@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/tests/stat.c b/tools/perf/tests/stat.c
index 6a20ff2..7f988a9 100644
--- a/tools/perf/tests/stat.c
+++ b/tools/perf/tests/stat.c
@@ -45,7 +45,7 @@ static int process_stat_config_event(struct perf_tool *tool __maybe_unused,
 	return 0;
 }
 
-int test__synthesize_stat_config(int subtest __maybe_unused)
+int test__synthesize_stat_config(struct test *test __maybe_unused, int subtest __maybe_unused)
 {
 	struct perf_stat_config stat_config = {
 		.aggr_mode	= AGGR_CORE,
@@ -75,7 +75,7 @@ static int process_stat_event(struct perf_tool *tool __maybe_unused,
 	return 0;
 }
 
-int test__synthesize_stat(int subtest __maybe_unused)
+int test__synthesize_stat(struct test *test __maybe_unused, int subtest __maybe_unused)
 {
 	struct perf_counts_values count;
 
@@ -101,7 +101,7 @@ static int process_stat_round_event(struct perf_tool *tool __maybe_unused,
 	return 0;
 }
 
-int test__synthesize_stat_round(int subtest __maybe_unused)
+int test__synthesize_stat_round(struct test *test __maybe_unused, int subtest __maybe_unused)
 {
 	TEST_ASSERT_VAL("failed to synthesize stat_config",
 		!perf_event__synthesize_stat_round(NULL, 0xdeadbeef, PERF_STAT_ROUND_TYPE__INTERVAL,