Update sonic-py-swsssdk submodule

Update sonic-py-swsssdk submodule to include below commits:
9da577d [port_util] Fix issue in function get_interface_oid_map (#114)
740a44c [port_util] Allow system without ports in config db run without errors (#109)

d07682e Merge pull request #111 from xumia/azp-coverage
482cac2 [Ethernet-IB][index] Modifed the port_util to support the VoQ Inband Port (#113)
69eac92 Support azp diff coverage

Signed-off-by: mlok <marty.lok@nokia.com>