[sonic-swss-common] Update submodule (#6686)

qiluo-msft · web-flow · commit d4b852abd200 · 2021-02-05T12:47:04.000-08:00
Includes below commits ``` 9e91e0d 2021-02-04 | Fix: RedisClient.set() should return bool (#454) [Qi Luo] 244a0bf 2021-02-04 | [swig] Add missing functions for ConfigDBConnector (#453) [Qi Luo] e659698 2021-01-22 | [dbconnector] Make sure json is declared as non null object (#452) [Kamil Cudnik] ```
diff --git a/src/sonic-swss-common b/src/sonic-swss-common
@@ -1 +1 @@
-Subproject commit e49b18f2512a9331579cea37ab199730051a68e9
+Subproject commit 9e91e0d891398b468b8087682ae91335791fac51
