perf tools: Rename struct thread_map to struct perf_thread_map

Rename struct thread_map to struct perf_thread_map, so it could be part
of libperf.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@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/20190721112506.12306-4-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/tests/keep-tracking.c b/tools/perf/tests/keep-tracking.c
index 68331a8..e1e5e32 100644
--- a/tools/perf/tests/keep-tracking.c
+++ b/tools/perf/tests/keep-tracking.c
@@ -65,7 +65,7 @@ int test__keep_tracking(struct test *test __maybe_unused, int subtest __maybe_un
 			.uses_mmap   = true,
 		},
 	};
-	struct thread_map *threads = NULL;
+	struct perf_thread_map *threads = NULL;
 	struct perf_cpu_map *cpus = NULL;
 	struct perf_evlist *evlist = NULL;
 	struct perf_evsel *evsel = NULL;