[201811][utilities][swss] advance sub module head (#3481)

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

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

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