[submodule] Advance submodule head for sonic-utilities

    [db_migrator] Support migrating database regarding buffer configuration for all Mellanox switches (sonic-net#993)
    [show/vlan]: fix show vlan config (sonic-net#1050)
    [PFCWD] Fix issue with "pfcwd show stats" command during SONiC init (sonic-net#1018)
    [config] Eliminate port breakout-related globals (sonic-net#1045)
    [teamshow]: refactor teamshow to use state db information (sonic-net#1049)
    [watermarkstat] Import print_function from __future__ (sonic-net#1048)
    [show]: split show interfaces commands into separate file (sonic-net#1044)
    Python 3 compliance (sonic-net#1043)
    Update all references to new 'sonic-installer' file name (sonic-net#1033)
    [config/show]: split vlan into separate file (sonic-net#1038)
    [pytest/coverage]: add coverage for all scripts (sonic-net#1041)
    enable watchdog before running platform specific reboot plugin (sonic-net#1037)
    [tests]:add coverage for config/main/utilities_common module (sonic-net#1039)
    [cli/feature]: split feature command into a separate file (sonic-net#1034)

Signed-off-by: Stephen Sun <stephens@nvidia.com>