bpftool: ensure bytes_memlock json output is correct

If a bpf map is created over 2^32 the memlock value as displayed in JSON
format will be incorrect. Use atoll instead of atoi so that the correct
number is displayed.

```
$ bpftool map create /sys/fs/bpf/test_bpfmap type hash key 4 \
  value 1024 entries 4194304 name test_bpfmap
$ bpftool map list
1: hash  name test_bpfmap  flags 0x0
        key 4B  value 1024B  max_entries 4194304  memlock 4328521728B
$ sudo bpftool map list -j | jq .[].bytes_memlock
33554432
```

Signed-off-by: Chris J Arges <[email protected]>

Author: arges

tools/bpf/bpftool/map.c

@@ -504,7 +504,7 @@ static int show_map_close_json(int fd, struct bpf_map_info *info)
 	jsonw_uint_field(json_wtr, "max_entries", info->max_entries);
 
 	if (memlock)
-		jsonw_int_field(json_wtr, "bytes_memlock", atoi(memlock));
+		jsonw_int_field(json_wtr, "bytes_memlock", atoll(memlock));
 	free(memlock);
 
 	if (info->type == BPF_MAP_TYPE_PROG_ARRAY) {

tools/bpf/bpftool/prog.c

@@ -485,7 +485,7 @@ static void print_prog_json(struct bpf_prog_info *info, int fd)
 
 	memlock = get_fdinfo(fd, "memlock");
 	if (memlock)
-		jsonw_int_field(json_wtr, "bytes_memlock", atoi(memlock));
+		jsonw_int_field(json_wtr, "bytes_memlock", atoll(memlock));
 	free(memlock);
 
 	if (info->nr_map_ids)