[submodule update]: Advance sonic-platform-common submodule. (sonic-n…

…et#3468)

Commits on Aug 15, 2019
[sonic_sfp] Fix global name about sfp module is not defined (#53) 04014b6

Commits on Aug 20, 2019
[xcvrd] Fix crashing due to missing fields of some module types (#54) c011c73
Remove duplicated sonic_eeprom and create symlink (#55) 087593e

Commits on Sep 10, 2019
[sfp_base] Raise exceptions (previously was incorrectly returning the… c21507e
Added new API to interact with the platform components (#60) 33b037d

Signed-off-by: Nazarii Hnydyn <nazariig@mellanox.com>