libbpf-tools/gethostlatency: correct section name (iovisor#4944)

handle_entry and handle_return are attached to uprobes getaddrinfo, gethostbyname, and gethostbyname2, so it doesn't make sense to have the section name be kprobe

libbpf-tools/gethostlatency.bpf.c

@@ -60,13 +60,13 @@ static int probe_return(struct pt_regs *ctx)
  return 0;
 }
 
-SEC("kprobe/handle_entry")
+SEC("uprobe")
 int BPF_KPROBE(handle_entry)
 {
  return probe_entry(ctx);
 }
 
-SEC("kretprobe/handle_return")
+SEC("uretprobe")
 int BPF_KRETPROBE(handle_return)
 {
  return probe_return(ctx);