[submodule update] sonic-db-syncd (#7225)

df46ed418e661a9bccdb2639d8873def356f8ba0 (HEAD -> master, origin/master, origin/HEAD) Fix the LLDP_LOC_CHASSIS not getting populated if no remote neighbors are present (#39)
e487532e11cc0e97cfce573b6b997fdd0beeb660 [CI] Set up CI&PR with Azure Pipelines (#38)
3c9f488490a1dbded20dbf2d8a88a5ab4dbda8df Replace swsssdk's SonicV2Connector with swsscommon's implementation (#35)

Signed-off-by: Abhishek Dosi <abdosi@microsoft.com>