[201811][utilities][swss] advance sub module head

Submodule src/sonic-swss 24fcbb6..3cee6b8:
  > [aclorch]: Fix table name in counter table for mirror rules (sonic-net#1060)
  > Cannot ping to link-local ipv6 interface address of the switch. (sonic-net#774)
  > [MirrorOrch]: Mirror Session Retention across Warm Reboot (sonic-net#1062)

Submodule src/sonic-utilities afaedb7..a06bee7:
  > [201811][config] Add '-h' and '-?' as help options to unify with show/sonic-clear cmds (sonic-net#654)
  > Revert "Fixed config Asym PFC CLI. (sonic-net#632)" (sonic-net#652)

Signed-off-by: Ying Xie <ying.xie@microsoft.com>