[swss] update swss pointer (#3055)

to include update in mellanox PFCWD lua script
matching new SAI

sonic-swss:
    407d048 [mellanox] convert logic to use quanta in pfc_detect_mellanox.lua (#930)
    67c0940 [test]: Skip test_clear in test_watermark (#937)
    c72c34f Enable Vnet/Vxlan VS test (#935)
    4c771d0 add incCrmAclUsedCounter and decCrmAclUsedCounter for SAI_ACL_BIND_POINT_TYPE_SWITCH case. (#899)
    825c0cb [vs]: Fix bitmap VNET virtual switch test (#936)
    4577b40 Add buffer pool watermark support (#853)
    4a67378 Add support of VXLAN tunnel removal (#931)

Signed-off-by: Stepan Blyschak <stepanb@mellanox.com>