Add symbols for linux for sctp_default_sndinfo

gtests/net/packetdrill/symbols_linux.c

@@ -107,7 +107,10 @@ struct int_symbol platform_symbols_table[] = {
 	{ SCTP_MAXSEG,                      "SCTP_MAXSEG"                     },
 	{ SCTP_DELAYED_SACK,                "SCTP_DELAYED_SACK"               },
 	{ SCTP_MAX_BURST,                   "SCTP_MAX_BURST"                  },
+	{ SCTP_DEFAULT_SNDINFO,             "SCTP_DEFAULT_SNDINFO"            },
+#if 0
 	{ SCTP_EVENT,                       "SCTP_EVENT"                      },
+#endif
 	{ SCTP_PEER_ADDR_PARAMS,            "SCTP_PEER_ADDR_PARAMS"           },
 	{ SCTP_STATUS,                      "SCTP_STATUS"                     },
 	{ SCTP_GET_PEER_ADDR_INFO,          "SCTP_GET_PEER_ADDR_INFO"         },