[submodule]: update sonic-swss-common (#4826)

* 77d3417 2020-06-22 | [sonic-swss-common] ARMHF warning fixes (#352) (HEAD -> master, origin/master, origin/HEAD) [arheneus@marvell.com]
* da8e264 2020-06-21 | [python3]: build python3-swsscommon for python3 support (#355) [lguohan]
* 292b08a 2020-06-16 | Changes to support SONiC Gearbox Manager (#347) [Syd Logan]
* 58ca4d9 2020-06-10 | Add missed BGP tables into the schema (#351) [pavel-shirshov]
* cddfc4e 2020-06-09 | [loglevel] Avoid accessing null ptr in swssloglevel (#349) [Stephen Sun]
* 8fce898 2020-06-08 | [schema] update schema with rates and utilization table names (#330) [Mykola F]

Signed-off-by: Guohan Lu <lguohan@gmail.com>