bgpd: VTY string fixes for debug commands

* bgpd/bgp_debug.c: fix VTY strings for BGP debug commands to match
  correct syntax
(cherry picked from commit 6e22b9017e1ae2ce61c383b1b2b63973207704ac)
diff --git a/bgpd/bgp_debug.c b/bgpd/bgp_debug.c
index c2077a5..26b35df 100644
--- a/bgpd/bgp_debug.c
+++ b/bgpd/bgp_debug.c
@@ -331,7 +331,6 @@
        undebug_bgp_as4_cmd,
        "undebug bgp as4",
        UNDEBUG_STR
-       DEBUG_STR
        BGP_STR
        "BGP AS4 actions\n")
 
@@ -340,6 +339,7 @@
        "debug bgp as4 segment",
        DEBUG_STR
        BGP_STR
+       "BGP AS4 actions\n"
        "BGP AS4 aspath segment handling\n")
 {
   if (vty->node == CONFIG_NODE)
@@ -358,6 +358,7 @@
        NO_STR
        DEBUG_STR
        BGP_STR
+       "BGP AS4 actions\n"
        "BGP AS4 aspath segment handling\n")
 {
   if (vty->node == CONFIG_NODE)
@@ -374,8 +375,8 @@
        undebug_bgp_as4_segment_cmd,
        "undebug bgp as4 segment",
        UNDEBUG_STR
-       DEBUG_STR
        BGP_STR
+       "BGP AS4 actions\n"
        "BGP AS4 aspath segment handling\n")
 
 DEFUN (debug_bgp_fsm,
@@ -417,7 +418,6 @@
        undebug_bgp_fsm_cmd,
        "undebug bgp fsm",
        UNDEBUG_STR
-       DEBUG_STR
        BGP_STR
        "Finite State Machine\n")
 
@@ -715,7 +715,6 @@
        undebug_bgp_zebra_cmd,
        "undebug bgp zebra",
        UNDEBUG_STR
-       DEBUG_STR
        BGP_STR
        "BGP Zebra messages\n")