libbpf-tools/futexctn: Fix compliation warning due to improper format…

… specifier

futexctn.c:235:31: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘uint64_t {aka long unsigned int}’ [-Wformat=]
     printf("    #%-2d 0x%016llx [unknown]\n", idx++, ip[i]);
                         ~~~~~~^                      ~~~~~
                         %016lx
futexctn.c:247:30: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘uint64_t {aka long unsigned int}’ [-Wformat=]
    printf("    #%-2d 0x%016llx", idx++, ip[i]);
                        ~~~~~~^          ~~~~~
                        %016lx

Update the format specifier according to the data type of 'ip'.

libbpf-tools/futexctn.c

@@ -233,7 +233,7 @@ static int print_stack(struct futexctn_bpf *obj, struct hist_key *info)
  fprintf(stderr, "failed to get syms\n");
  } else {
  for (i = 0; i < env.perf_max_stack_depth && ip[i]; i++)
- printf(" #%-2d 0x%016llx [unknown]\n", idx++, ip[i]);
+ printf(" #%-2d 0x%016lx [unknown]\n", idx++, ip[i]);
  }
  goto cleanup;
  }
@@ -246,7 +246,7 @@ static int print_stack(struct futexctn_bpf *obj, struct hist_key *info)
  printf(" [unknown]\n");
  } else {
  sym = syms__map_addr_dso(syms, ip[i], &dso_name, &dso_offset);
- printf(" #%-2d 0x%016llx", idx++, ip[i]);
+ printf(" #%-2d 0x%016lx", idx++, ip[i]);
  if (sym)
  printf(" %s+0x%lx", sym->name, sym->offset);
  if (dso_name)