perf record: Correct the help info of option "--no-bpf-event"

The help info of option "--no-bpf-event" is wrongly described as "record
bpf events", correct it.

Committer testing:

  $ perf record -h bpf

   Usage: perf record [<options>] [<command>]
      or: perf record [<options>] -- <command> [<options>]

          --clang-opt <clang options>
                            options passed to clang when compiling BPF scriptlets
          --clang-path <clang path>
                            clang binary to use for compiling BPF scriptlets
          --no-bpf-event    do not record bpf events

  $

Fixes: 71184c6a ("perf record: Replace option --bpf-event with --no-bpf-event")
Signed-off-by: Wei Li <liwei391@huawei.com>
Acked-by: Song Liu <songliubraving@fb.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Hanjun Guo <guohanjun@huawei.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Li Bin <huawei.libin@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lore.kernel.org/lkml/20200819031947.12115-1-liwei391@huawei.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-record.c

@@ -2452,7 +2452,7 @@ static struct option __record_options[] = {
 	OPT_BOOLEAN(0, "tail-synthesize", &record.opts.tail_synthesize,
 		    "synthesize non-sample events at the end of output"),
 	OPT_BOOLEAN(0, "overwrite", &record.opts.overwrite, "use overwrite mode"),
-	OPT_BOOLEAN(0, "no-bpf-event", &record.opts.no_bpf_event, "record bpf events"),
+	OPT_BOOLEAN(0, "no-bpf-event", &record.opts.no_bpf_event, "do not record bpf events"),
 	OPT_BOOLEAN(0, "strict-freq", &record.opts.strict_freq,
 		    "Fail if the specified frequency can't be used"),
 	OPT_CALLBACK('F', "freq", &record.opts, "freq or 'max'",