Add support for SCTP_EXPLICIT_EOR socket option.

gtests/net/packetdrill/symbols_freebsd.c

@@ -97,6 +97,7 @@ struct int_symbol platform_symbols_table[] = {
 	{ SCTP_STATUS,                      "SCTP_STATUS"                     },
 	{ SCTP_GET_PEER_ADDR_INFO,          "SCTP_GET_PEER_ADDR_INFO"         },
 	{ SCTP_FRAGMENT_INTERLEAVE,         "SCTP_FRAGMENT_INTERLEAVE"        },
+	{ SCTP_EXPLICIT_EOR,                "SCTP_EXPLICIT_EOR"               },
 #if defined(SCTP_INTERLEAVING_SUPPORTED)
 	{ SCTP_INTERLEAVING_SUPPORTED,      "SCTP_INTERLEAVING_SUPPORTED"     },
 #endif