perf trace beauty fcntl: Do not suppress 'cmd' when zero, should be DUPFD

Before:

 77059.513 ( 0.005 ms): bash/6649 fcntl(fd: 1</dev/pts/12>, arg: 10) = 10</dev/pts/12>

After:

 77059.513 ( 0.005 ms): bash/6649 fcntl(fd: 1</dev/pts/12>, cmd: DUPFD, arg: 10) = 10</dev/pts/12>

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-woois88uwcr4xu38xx1ihiwo@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-trace.c

@@ -652,7 +652,8 @@ static struct syscall_fmt {
 	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
 	{ .name	    = "fcntl",	    .errmsg = true,
 	  .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */
-			   .parm      = &strarrays__fcntl_cmds_arrays, /* cmd */ },
+			   .parm      = &strarrays__fcntl_cmds_arrays,
+			   .show_zero = true, },
 		   [2] = { .scnprintf =  SCA_FCNTL_ARG, /* arg */ }, }, },
 	{ .name	    = "fdatasync",  .errmsg = true, },
 	{ .name	    = "flock",	    .errmsg = true,