[SAI] Add SAI_IPMC_GROUP_ATTR_LABEL and SAI_NEXT_HOP_GROUP_ATTR_LABEL.

inc/saiipmcgroup.h

@@ -60,6 +60,15 @@ typedef enum _sai_ipmc_group_attr_t
      */
     SAI_IPMC_GROUP_ATTR_IPMC_MEMBER_LIST,
 
+    /**
+     * @brief Label attribute used to uniquely identify IPMC-group.
+     *
+     * @type char
+     * @flags CREATE_AND_SET
+     * @default ""
+     */
+    SAI_IPMC_GROUP_ATTR_LABEL,
+
     /**
      * @brief Flag indicating that the member list is specified at create time
      *

inc/sail2mcgroup.h

@@ -60,6 +60,15 @@ typedef enum _sai_l2mc_group_attr_t
      */
     SAI_L2MC_GROUP_ATTR_L2MC_MEMBER_LIST,
 
+    /**
+     * @brief Label attribute used to uniquely identify L2MC-group.
+     *
+     * @type char
+     * @flags CREATE_AND_SET
+     * @default ""
+     */
+    SAI_L2MC_GROUP_ATTR_LABEL,
+
     /**
      * @brief End of attributes
      */

inc/sainexthop.h

@@ -231,6 +231,15 @@ typedef enum _sai_next_hop_attr_t
      */
     SAI_NEXT_HOP_ATTR_QOS_TC_AND_COLOR_TO_MPLS_EXP_MAP,
 
+    /**
+     * @brief Label attribute used to uniquely identify next-hop.
+     *
+     * @type char
+     * @flags CREATE_AND_SET
+     * @default ""
+     */
+    SAI_NEXT_HOP_ATTR_LABEL,
+
     /**
      * @brief To enable/disable source MAC rewrite
      *