[201811][utilities] advance sub module head (sonic-net#3469)

Submodule src/sonic-utilities fe2c656..afaedb7:
  > Revert "[FastReboot]: Send SIGINT to all teamd before stop (#633)" (#650)
  > Fixed config Asym PFC CLI. (#632)
  > [config] Do no stop or restart dependent services (#582)

Signed-off-by: Ying Xie <[email protected]>