bpftool: Add bash completion for token argument

This commit updates the bash completion script with the new token
argument.
$ bpftool
batch       cgroup      gen         iter        map         perf        struct_ops
btf         feature     help        link        net         prog        token

Signed-off-by: Tao Chen <[email protected]>

Author: Tao Chen

tools/bpf/bpftool/bash-completion/bpftool

@@ -1215,6 +1215,17 @@ _bpftool()
                     ;;
             esac
             ;;
+        token)
+            case $command in
+               show|list)
+                   return 0
+                   ;;
+               *)
+                   [[ $prev == $object ]] && \
+                       COMPREPLY=( $( compgen -W 'help show list' -- "$cur" ) )
+                   ;;
+            esac
+            ;;
     esac
 } &&
 complete -F _bpftool bpftool