[SCTP]: Set sk_err so that poll wakes up after a non-blocking connect failure.

Also fix some other cases where sk_err is not set for 1-1 style sockets.

Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>

include/net/sctp/command.h

@@ -99,6 +99,7 @@ typedef enum {
 	SCTP_CMD_DEL_NON_PRIMARY, /* Removes non-primary peer transports. */
 	SCTP_CMD_T3_RTX_TIMERS_STOP, /* Stops T3-rtx pending timers */
 	SCTP_CMD_FORCE_PRIM_RETRAN,  /* Forces retrans. over primary path. */
+	SCTP_CMD_SET_SK_ERR,	 /* Set sk_err */
 	SCTP_CMD_LAST
 } sctp_verb_t;