Update memcached

Changes:

- https://github.com/docker-library/memcached/commit/cb057ed: Update to 1.6.1

library/memcached

@@ -4,12 +4,12 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/memcached.git
 
-Tags: 1.6.0, 1.6, 1, latest
+Tags: 1.6.1, 1.6, 1, latest
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: c37e18a3a6a0b82d8364d96b2fbc75936e84086c
+GitCommit: cb057edbac4b089c45857de35e8a824b5d937e83
 Directory: debian
 
-Tags: 1.6.0-alpine, 1.6-alpine, 1-alpine, alpine
+Tags: 1.6.1-alpine, 1.6-alpine, 1-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: c37e18a3a6a0b82d8364d96b2fbc75936e84086c
+GitCommit: cb057edbac4b089c45857de35e8a824b5d937e83
 Directory: alpine