[202012][sonic-sairedis]Update sonic-sairedis submodule

Remove duplicate cisco-8000 functions and call to those functions (sonic-net#1077)
Support For CISCO debug-shell in syncd-container (sonic-net#1070)
Fix submodule SAI branch name (sonic-net#1031)

Signed-off-by: Kevin Wang <[email protected]>

Author: kevinskwang