perf beauty: Wire up the renameat flags table generator to the Makefile

Now when we run 'make -C tools/perf O=/tmp/build/perf' we end up with:

  $ cat /tmp/build/perf/trace/beauty/generated/rename_flags_array.c
  static const char *rename_flags[] = {
	[0 + 1] = "NOREPLACE",
	[1 + 1] = "EXCHANGE",
	[2 + 1] = "WHITEOUT",
  };
  $

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-4fad4xahrn04y06o0lc49clm@git.kernel.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>