[submodule]: Updating submodule pointers for pre-emphasis feature (#2978

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Advancing sub module pointers to dynamic transceiver support feature commit.

- src/sonic-swss
f437f9f..d616764

[policerorch]: Add PolicerOrch to bundle with mirror session (889)
Fix MIRROR_SESSION table macro name (802)
Ignore neighbor entry with BCAST MAC, check SAI status exists (914)
[vstest]: Update the mirror session state table name (917)
[test]: Skip tests under investigation (919)
[debian] increment debian compatibility to 10 to enable parallel package build (911)
[aclorch]: Add MIRROR_DSCP table type (906)
[test]: Mark some VLAN tests as Stretch only (903)
[warm restart assist] assume vector values could be reordered (921)
Suppress storm detect counter increment for ongoing pfc storm case during a warm reboot (869)
Fix vlan incremental config and add vs test cases (799)
Remove *_LEFT fields to allow PFC watchdog to enter fresh into the (897)
add dynamic transceiver tuning support (821)

- src/sonic-platform-common
92b54b1..7f95a2a

Enhance new platform API (19)
Add .gitignore file (28)
[sonic_platform_base] Add sonic_sfp and sonic_eeprom to sonic_platform_base (27)
Added type abbrev name to be used in media_settings.json for Dynamictransceiver tuning (32)

- src/sonic-platform-daemons
c8931f3..366ac0e

Fixed xcvrd shutdown flow. (23)
Add .gitignore file (27)
Dynamic transceiver tuning support (26)