Update sonic-swss, sonic-utilites submodules

sonic-swss

1aa40f7 Remove port serdes object before removing port (#2152)
876d690 [doc] Updating Policer config in Configuration manual (#2144)

sonic-utilities
dfed952 show_platfom_info not run for simx (#2042)
71fdee7 [aclshow] fix aclshow when clear is called before counters are populated (#2037)
a48a027 [sonic-package-manager] implement blocking feature state change (#2035)
c51871d [ci] Fix python dependencies reference path. (#2060)