Update bash

Changes:

- https://github.com/tianon/docker-bash/commit/43b543d: Update to commit ad66335110980db1d1473918219efb5ac3f87b5e
- https://github.com/tianon/docker-bash/commit/52757e9: Update generated README
- https://github.com/tianon/docker-bash/commit/10c386f: Update to commit 969496e53b34c2439a0125d09957c62d51159ed5

library/bash

@@ -3,9 +3,9 @@
 Maintainers: Tianon Gravi <[email protected]> (@tianon)
 GitRepo: https://github.com/tianon/docker-bash.git
 
-Tags: devel-20190823, devel
+Tags: devel-20190906, devel
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 6cf7d9949ac6597241ac765021a7c590610d598c
+GitCommit: 43b543d78a7893c496d0dd470bdd8be9e459547c
 Directory: devel
 
 Tags: 5.0.11, 5.0, 5, latest